{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-50035", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T12:17:06.070Z", "datePublished": "2024-10-21T19:39:36.460Z", "dateUpdated": "2024-11-08T15:58:01.664Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-08T15:58:01.664Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nppp: fix ppp_async_encode() illegal access\n\nsyzbot reported an issue in ppp_async_encode() [1]\n\nIn this case, pppoe_sendmsg() is called with a zero size.\nThen ppp_async_encode() is called with an empty skb.\n\nBUG: KMSAN: uninit-value in ppp_async_encode drivers/net/ppp/ppp_async.c:545 [inline]\n BUG: KMSAN: uninit-value in ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675\n ppp_async_encode drivers/net/ppp/ppp_async.c:545 [inline]\n ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675\n ppp_async_send+0x130/0x1b0 drivers/net/ppp/ppp_async.c:634\n ppp_channel_bridge_input drivers/net/ppp/ppp_generic.c:2280 [inline]\n ppp_input+0x1f1/0xe60 drivers/net/ppp/ppp_generic.c:2304\n pppoe_rcv_core+0x1d3/0x720 drivers/net/ppp/pppoe.c:379\n sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1113\n __release_sock+0x1da/0x330 net/core/sock.c:3072\n release_sock+0x6b/0x250 net/core/sock.c:3626\n pppoe_sendmsg+0x2b8/0xb90 drivers/net/ppp/pppoe.c:903\n sock_sendmsg_nosec net/socket.c:729 [inline]\n __sock_sendmsg+0x30f/0x380 net/socket.c:744\n ____sys_sendmsg+0x903/0xb60 net/socket.c:2602\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2656\n __sys_sendmmsg+0x3c1/0x960 net/socket.c:2742\n __do_sys_sendmmsg net/socket.c:2771 [inline]\n __se_sys_sendmmsg net/socket.c:2768 [inline]\n __x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2768\n x64_sys_call+0xb6e/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:308\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nUninit was created at:\n slab_post_alloc_hook mm/slub.c:4092 [inline]\n slab_alloc_node mm/slub.c:4135 [inline]\n kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4187\n kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587\n __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678\n alloc_skb include/linux/skbuff.h:1322 [inline]\n sock_wmalloc+0xfe/0x1a0 net/core/sock.c:2732\n pppoe_sendmsg+0x3a7/0xb90 drivers/net/ppp/pppoe.c:867\n sock_sendmsg_nosec net/socket.c:729 [inline]\n __sock_sendmsg+0x30f/0x380 net/socket.c:744\n ____sys_sendmsg+0x903/0xb60 net/socket.c:2602\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2656\n __sys_sendmmsg+0x3c1/0x960 net/socket.c:2742\n __do_sys_sendmmsg net/socket.c:2771 [inline]\n __se_sys_sendmmsg net/socket.c:2768 [inline]\n __x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2768\n x64_sys_call+0xb6e/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:308\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nCPU: 1 UID: 0 PID: 5411 Comm: syz.1.14 Not tainted 6.12.0-rc1-syzkaller-00165-g360c1f1f24c6 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ppp/ppp_async.c"], "versions": [{"version": "1da177e4c3f4", "lessThan": "4151ec65abd7", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "8dfe93901b41", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "30d91a478d58", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "fadf8fdb3110", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "ce249a4c68d0", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "8fe992ff3df4", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "c007a1479724", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "40dddd4b8bd0", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ppp/ppp_async.c"], "versions": [{"version": "2.6.12", "status": "affected"}, {"version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.323", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.285", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.227", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.168", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.113", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.57", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11.4", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12-rc3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/4151ec65abd755133ebec687218fadd2d2631167"}, {"url": "https://git.kernel.org/stable/c/8dfe93901b410ae41264087427f3b9f389388f83"}, {"url": "https://git.kernel.org/stable/c/30d91a478d58cbae3dbaa8224d17d0d839f0d71b"}, {"url": "https://git.kernel.org/stable/c/fadf8fdb3110d3138e05c3765f645535434f8d76"}, {"url": "https://git.kernel.org/stable/c/ce249a4c68d0ce27a8c5d853338d502e2711a314"}, {"url": "https://git.kernel.org/stable/c/8fe992ff3df493d1949922ca234419f3ede08dff"}, {"url": "https://git.kernel.org/stable/c/c007a14797240607038bd3464501109f408940e2"}, {"url": "https://git.kernel.org/stable/c/40dddd4b8bd08a69471efd96107a4e1c73fabefc"}], "title": "ppp: fix ppp_async_encode() illegal access", "x_generator": {"engine": "bippy-9e1c9544281a"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-50035", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-10-22T13:25:33.483652Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-22T13:28:45.143Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-50035", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-10-22T13:25:33.483652Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-22T13:25:36.838Z"}}], "cna": {"title": "ppp: fix ppp_async_encode() illegal access", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1da177e4c3f4", "lessThan": "4151ec65abd7", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f4", "lessThan": "8dfe93901b41", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f4", "lessThan": "30d91a478d58", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f4", "lessThan": "fadf8fdb3110", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f4", "lessThan": "ce249a4c68d0", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f4", "lessThan": "8fe992ff3df4", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f4", "lessThan": "c007a1479724", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f4", "lessThan": "40dddd4b8bd0", "versionType": "git"}], "programFiles": ["drivers/net/ppp/ppp_async.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.12"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.12", "versionType": "semver"}, {"status": "unaffected", "version": "4.19.323", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.285", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.227", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.168", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.113", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.57", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.11.4", "versionType": "semver", "lessThanOrEqual": "6.11.*"}, {"status": "unaffected", "version": "6.12-rc3", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/ppp/ppp_async.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/4151ec65abd755133ebec687218fadd2d2631167"}, {"url": "https://git.kernel.org/stable/c/8dfe93901b410ae41264087427f3b9f389388f83"}, {"url": "https://git.kernel.org/stable/c/30d91a478d58cbae3dbaa8224d17d0d839f0d71b"}, {"url": "https://git.kernel.org/stable/c/fadf8fdb3110d3138e05c3765f645535434f8d76"}, {"url": "https://git.kernel.org/stable/c/ce249a4c68d0ce27a8c5d853338d502e2711a314"}, {"url": "https://git.kernel.org/stable/c/8fe992ff3df493d1949922ca234419f3ede08dff"}, {"url": "https://git.kernel.org/stable/c/c007a14797240607038bd3464501109f408940e2"}, {"url": "https://git.kernel.org/stable/c/40dddd4b8bd08a69471efd96107a4e1c73fabefc"}], "x_generator": {"engine": "bippy-9e1c9544281a"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nppp: fix ppp_async_encode() illegal access\n\nsyzbot reported an issue in ppp_async_encode() [1]\n\nIn this case, pppoe_sendmsg() is called with a zero size.\nThen ppp_async_encode() is called with an empty skb.\n\nBUG: KMSAN: uninit-value in ppp_async_encode drivers/net/ppp/ppp_async.c:545 [inline]\n BUG: KMSAN: uninit-value in ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675\n ppp_async_encode drivers/net/ppp/ppp_async.c:545 [inline]\n ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675\n ppp_async_send+0x130/0x1b0 drivers/net/ppp/ppp_async.c:634\n ppp_channel_bridge_input drivers/net/ppp/ppp_generic.c:2280 [inline]\n ppp_input+0x1f1/0xe60 drivers/net/ppp/ppp_generic.c:2304\n pppoe_rcv_core+0x1d3/0x720 drivers/net/ppp/pppoe.c:379\n sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1113\n __release_sock+0x1da/0x330 net/core/sock.c:3072\n release_sock+0x6b/0x250 net/core/sock.c:3626\n pppoe_sendmsg+0x2b8/0xb90 drivers/net/ppp/pppoe.c:903\n sock_sendmsg_nosec net/socket.c:729 [inline]\n __sock_sendmsg+0x30f/0x380 net/socket.c:744\n ____sys_sendmsg+0x903/0xb60 net/socket.c:2602\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2656\n __sys_sendmmsg+0x3c1/0x960 net/socket.c:2742\n __do_sys_sendmmsg net/socket.c:2771 [inline]\n __se_sys_sendmmsg net/socket.c:2768 [inline]\n __x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2768\n x64_sys_call+0xb6e/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:308\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nUninit was created at:\n slab_post_alloc_hook mm/slub.c:4092 [inline]\n slab_alloc_node mm/slub.c:4135 [inline]\n kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4187\n kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587\n __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678\n alloc_skb include/linux/skbuff.h:1322 [inline]\n sock_wmalloc+0xfe/0x1a0 net/core/sock.c:2732\n pppoe_sendmsg+0x3a7/0xb90 drivers/net/ppp/pppoe.c:867\n sock_sendmsg_nosec net/socket.c:729 [inline]\n __sock_sendmsg+0x30f/0x380 net/socket.c:744\n ____sys_sendmsg+0x903/0xb60 net/socket.c:2602\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2656\n __sys_sendmmsg+0x3c1/0x960 net/socket.c:2742\n __do_sys_sendmmsg net/socket.c:2771 [inline]\n __se_sys_sendmmsg net/socket.c:2768 [inline]\n __x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2768\n x64_sys_call+0xb6e/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:308\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nCPU: 1 UID: 0 PID: 5411 Comm: syz.1.14 Not tainted 6.12.0-rc1-syzkaller-00165-g360c1f1f24c6 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024"}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-08T15:58:01.664Z"}}}, "cveMetadata": {"cveId": "CVE-2024-50035", "state": "PUBLISHED", "dateUpdated": "2024-11-08T15:58:01.664Z", "dateReserved": "2024-10-21T12:17:06.070Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-10-21T19:39:36.460Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E346E1F4-278B-4263-B0B8-7234D7CC31E4", "versionEndExcluding": "5.10.227", "versionStartIncluding": "2.6.12", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4D51C05D-455B-4D8D-89E7-A58E140B864C", "versionEndExcluding": "5.15.168", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D01BD22E-ACD1-4618-9D01-6116570BE1EE", "versionEndExcluding": "6.1.113", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "05D83DB8-7465-4F88-AFB2-980011992AC1", "versionEndExcluding": "6.6.57", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "AA84D336-CE9A-4535-B901-1AD77EC17C34", "versionEndExcluding": "6.11.4", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*", "matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*", "matchCriteriaId": "925478D0-3E3D-4E6F-ACD5-09F28D5DF82C", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nppp: fix ppp_async_encode() illegal access\n\nsyzbot reported an issue in ppp_async_encode() [1]\n\nIn this case, pppoe_sendmsg() is called with a zero size.\nThen ppp_async_encode() is called with an empty skb.\n\nBUG: KMSAN: uninit-value in ppp_async_encode drivers/net/ppp/ppp_async.c:545 [inline]\n BUG: KMSAN: uninit-value in ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675\n ppp_async_encode drivers/net/ppp/ppp_async.c:545 [inline]\n ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675\n ppp_async_send+0x130/0x1b0 drivers/net/ppp/ppp_async.c:634\n ppp_channel_bridge_input drivers/net/ppp/ppp_generic.c:2280 [inline]\n ppp_input+0x1f1/0xe60 drivers/net/ppp/ppp_generic.c:2304\n pppoe_rcv_core+0x1d3/0x720 drivers/net/ppp/pppoe.c:379\n sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1113\n __release_sock+0x1da/0x330 net/core/sock.c:3072\n release_sock+0x6b/0x250 net/core/sock.c:3626\n pppoe_sendmsg+0x2b8/0xb90 drivers/net/ppp/pppoe.c:903\n sock_sendmsg_nosec net/socket.c:729 [inline]\n __sock_sendmsg+0x30f/0x380 net/socket.c:744\n ____sys_sendmsg+0x903/0xb60 net/socket.c:2602\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2656\n __sys_sendmmsg+0x3c1/0x960 net/socket.c:2742\n __do_sys_sendmmsg net/socket.c:2771 [inline]\n __se_sys_sendmmsg net/socket.c:2768 [inline]\n __x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2768\n x64_sys_call+0xb6e/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:308\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nUninit was created at:\n slab_post_alloc_hook mm/slub.c:4092 [inline]\n slab_alloc_node mm/slub.c:4135 [inline]\n kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4187\n kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587\n __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678\n alloc_skb include/linux/skbuff.h:1322 [inline]\n sock_wmalloc+0xfe/0x1a0 net/core/sock.c:2732\n pppoe_sendmsg+0x3a7/0xb90 drivers/net/ppp/pppoe.c:867\n sock_sendmsg_nosec net/socket.c:729 [inline]\n __sock_sendmsg+0x30f/0x380 net/socket.c:744\n ____sys_sendmsg+0x903/0xb60 net/socket.c:2602\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2656\n __sys_sendmmsg+0x3c1/0x960 net/socket.c:2742\n __do_sys_sendmmsg net/socket.c:2771 [inline]\n __se_sys_sendmmsg net/socket.c:2768 [inline]\n __x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2768\n x64_sys_call+0xb6e/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:308\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nCPU: 1 UID: 0 PID: 5411 Comm: syz.1.14 Not tainted 6.12.0-rc1-syzkaller-00165-g360c1f1f24c6 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ppp: se corrige el acceso ilegal a ppp_async_encode() syzbot inform\u00f3 un problema en ppp_async_encode() [1] En este caso, se llama a pppoe_sendmsg() con un tama\u00f1o cero. Luego, se llama a ppp_async_encode() con un skb vac\u00edo. ERROR: KMSAN: valor no inicializado en ppp_async_encode drivers/net/ppp/ppp_async.c:545 [en l\u00ednea] ERROR: KMSAN: valor no inicializado en ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675 ppp_async_encode drivers/net/ppp/ppp_async.c:545 [en l\u00ednea] ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675 ppp_async_send+0x130/0x1b0 drivers/net/ppp/ppp_async.c:634 ppp_channel_bridge_input drivers/net/ppp/ppp_generic.c:2280 [en l\u00ednea] ppp_input+0x1f1/0xe60 drivers/net/ppp/ppp_generic.c:2304 pppoe_rcv_core+0x1d3/0x720 drivers/net/ppp/pppoe.c:379 sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1113 __release_sock+0x1da/0x330 net/core/sock.c:3072 release_sock+0x6b/0x250 net/core/sock.c:3626 pppoe_sendmsg+0x2b8/0xb90 drivers/net/ppp/pppoe.c:903 sock_sendmsg_nosec net/socket.c:729 [en l\u00ednea] __sock_sendmsg+0x30f/0x380 red/socket.c:744 ____sys_sendmsg+0x903/0xb60 red/socket.c:2602 ___sys_sendmsg+0x28d/0x3c0 red/socket.c:2656 __sys_sendmmsg+0x3c1/0x960 red/socket.c:2742 __do_sys_sendmmsg red/socket.c:2771 [en l\u00ednea] __se_sys_sendmmsg red/socket.c:2768 [en l\u00ednea] __x64_sys_sendmmsg+0xbc/0x120 red/socket.c:2768 x64_sys_call+0xb6e/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:308 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit se cre\u00f3 en: slab_post_alloc_hook mm/slub.c:4092 [en l\u00ednea] slab_alloc_node mm/slub.c:4135 [en l\u00ednea] kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4187 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587 __alloc_skb+0x363/0x7b0 red/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1322 [en l\u00ednea] sock_wmalloc+0xfe/0x1a0 red/core/sock.c:2732 pppoe_sendmsg+0x3a7/0xb90 drivers/net/ppp/pppoe.c:867 sock_sendmsg_nosec red/socket.c:729 [en l\u00ednea] __sock_sendmsg+0x30f/0x380 red/socket.c:744 ____sys_sendmsg+0x903/0xb60 red/socket.c:2602 ___sys_sendmsg+0x28d/0x3c0 red/socket.c:2656 __sys_sendmmsg+0x3c1/0x960 red/socket.c:2742 __do_sys_sendmmsg red/socket.c:2771 [en l\u00ednea] __se_sys_sendmmsg red/socket.c:2768 [en l\u00ednea] __x64_sys_sendmmsg+0xbc/0x120 red/socket.c:2768 x64_sys_call+0xb6e/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:308 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 1 UID: 0 PID: 5411 Comm: syz.1.14 No contaminado 6.12.0-rc1-syzkaller-00165-g360c1f1f24c6 #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 13/09/2024"}], "id": "CVE-2024-50035", "lastModified": "2024-11-08T16:15:42.777", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-10-21T20:15:16.640", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/30d91a478d58cbae3dbaa8224d17d0d839f0d71b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/40dddd4b8bd08a69471efd96107a4e1c73fabefc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4151ec65abd755133ebec687218fadd2d2631167"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8dfe93901b410ae41264087427f3b9f389388f83"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8fe992ff3df493d1949922ca234419f3ede08dff"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c007a14797240607038bd3464501109f408940e2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ce249a4c68d0ce27a8c5d853338d502e2711a314"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fadf8fdb3110d3138e05c3765f645535434f8d76"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-908"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ppp: fix ppp_async_encode() illegal access", "id": "2320636", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320636"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nppp: fix ppp_async_encode() illegal access\nsyzbot reported an issue in ppp_async_encode() [1]\nIn this case, pppoe_sendmsg() is called with a zero size.\nThen ppp_async_encode() is called with an empty skb.\nBUG: KMSAN: uninit-value in ppp_async_encode drivers/net/ppp/ppp_async.c:545 [inline]\nBUG: KMSAN: uninit-value in ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675\nppp_async_encode drivers/net/ppp/ppp_async.c:545 [inline]\nppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675\nppp_async_send+0x130/0x1b0 drivers/net/ppp/ppp_async.c:634\nppp_channel_bridge_input drivers/net/ppp/ppp_generic.c:2280 [inline]\nppp_input+0x1f1/0xe60 drivers/net/ppp/ppp_generic.c:2304\npppoe_rcv_core+0x1d3/0x720 drivers/net/ppp/pppoe.c:379\nsk_backlog_rcv+0x13b/0x420 include/net/sock.h:1113\n__release_sock+0x1da/0x330 net/core/sock.c:3072\nrelease_sock+0x6b/0x250 net/core/sock.c:3626\npppoe_sendmsg+0x2b8/0xb90 drivers/net/ppp/pppoe.c:903\nsock_sendmsg_nosec net/socket.c:729 [inline]\n__sock_sendmsg+0x30f/0x380 net/socket.c:744\n____sys_sendmsg+0x903/0xb60 net/socket.c:2602\n___sys_sendmsg+0x28d/0x3c0 net/socket.c:2656\n__sys_sendmmsg+0x3c1/0x960 net/socket.c:2742\n__do_sys_sendmmsg net/socket.c:2771 [inline]\n__se_sys_sendmmsg net/socket.c:2768 [inline]\n__x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2768\nx64_sys_call+0xb6e/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:308\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\ndo_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\nUninit was created at:\nslab_post_alloc_hook mm/slub.c:4092 [inline]\nslab_alloc_node mm/slub.c:4135 [inline]\nkmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4187\nkmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587\n__alloc_skb+0x363/0x7b0 net/core/skbuff.c:678\nalloc_skb include/linux/skbuff.h:1322 [inline]\nsock_wmalloc+0xfe/0x1a0 net/core/sock.c:2732\npppoe_sendmsg+0x3a7/0xb90 drivers/net/ppp/pppoe.c:867\nsock_sendmsg_nosec net/socket.c:729 [inline]\n__sock_sendmsg+0x30f/0x380 net/socket.c:744\n____sys_sendmsg+0x903/0xb60 net/socket.c:2602\n___sys_sendmsg+0x28d/0x3c0 net/socket.c:2656\n__sys_sendmmsg+0x3c1/0x960 net/socket.c:2742\n__do_sys_sendmmsg net/socket.c:2771 [inline]\n__se_sys_sendmmsg net/socket.c:2768 [inline]\n__x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2768\nx64_sys_call+0xb6e/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:308\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\ndo_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\nCPU: 1 UID: 0 PID: 5411 Comm: syz.1.14 Not tainted 6.12.0-rc1-syzkaller-00165-g360c1f1f24c6 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024"], "name": "CVE-2024-50035", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50035\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50035\nhttps://lore.kernel.org/linux-cve-announce/2024102132-CVE-2024-50035-82d8@gregkh/T"], "threat_severity": "Moderate"}