{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-35839", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-17T13:50:33.104Z", "datePublished": "2024-05-17T14:27:30.524Z", "dateUpdated": "2024-08-02T03:21:48.411Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:29:53.760Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: bridge: replace physindev with physinif in nf_bridge_info\n\nAn skb can be added to a neigh->arp_queue while waiting for an arp\nreply. Where original skb's skb->dev can be different to neigh's\nneigh->dev. For instance in case of bridging dnated skb from one veth to\nanother, the skb would be added to a neigh->arp_queue of the bridge.\n\nAs skb->dev can be reset back to nf_bridge->physindev and used, and as\nthere is no explicit mechanism that prevents this physindev from been\nfreed under us (for instance neigh_flush_dev doesn't cleanup skbs from\ndifferent device's neigh queue) we can crash on e.g. this stack:\n\narp_process\n neigh_update\n skb = __skb_dequeue(&neigh->arp_queue)\n neigh_resolve_output(..., skb)\n ...\n br_nf_dev_xmit\n br_nf_pre_routing_finish_bridge_slow\n skb->dev = nf_bridge->physindev\n br_handle_frame_finish\n\nLet's use plain ifindex instead of net_device link. To peek into the\noriginal net_device we will use dev_get_by_index_rcu(). Thus either we\nget device and are safe to use it or we don't get it and drop skb."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/linux/netfilter_bridge.h", "include/linux/skbuff.h", "net/bridge/br_netfilter_hooks.c", "net/bridge/br_netfilter_ipv6.c", "net/ipv4/netfilter/nf_reject_ipv4.c", "net/ipv6/netfilter/nf_reject_ipv6.c"], "versions": [{"version": "c4e70a87d975", "lessThan": "7ae19ee81ca5", "status": "affected", "versionType": "git"}, {"version": "c4e70a87d975", "lessThan": "9325e3188a9c", "status": "affected", "versionType": "git"}, {"version": "c4e70a87d975", "lessThan": "544add1f1cfb", "status": "affected", "versionType": "git"}, {"version": "c4e70a87d975", "lessThan": "9874808878d9", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/linux/netfilter_bridge.h", "include/linux/skbuff.h", "net/bridge/br_netfilter_hooks.c", "net/bridge/br_netfilter_ipv6.c", "net/ipv4/netfilter/nf_reject_ipv4.c", "net/ipv6/netfilter/nf_reject_ipv6.c"], "versions": [{"version": "4.2", "status": "affected"}, {"version": "0", "lessThan": "4.2", "status": "unaffected", "versionType": "custom"}, {"version": "6.1.75", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.6.14", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.7.2", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.8", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/7ae19ee81ca56b13c50a78de6c47d5b8fdc9d97b"}, {"url": "https://git.kernel.org/stable/c/9325e3188a9cf3f69fc6f32af59844bbc5b90547"}, {"url": "https://git.kernel.org/stable/c/544add1f1cfb78c3dfa3e6edcf4668f6be5e730c"}, {"url": "https://git.kernel.org/stable/c/9874808878d9eed407e3977fd11fee49de1e1d86"}], "title": "netfilter: bridge: replace physindev with physinif in nf_bridge_info", "x_generator": {"engine": "bippy-a5840b7849dd"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-35839", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-05-23T19:26:55.890240Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:33:44.186Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T03:21:48.411Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/7ae19ee81ca56b13c50a78de6c47d5b8fdc9d97b", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/9325e3188a9cf3f69fc6f32af59844bbc5b90547", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/544add1f1cfb78c3dfa3e6edcf4668f6be5e730c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/9874808878d9eed407e3977fd11fee49de1e1d86", "tags": ["x_transferred"]}]}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: bridge: replace physindev with physinif in nf_bridge_info\n\nAn skb can be added to a neigh->arp_queue while waiting for an arp\nreply. Where original skb's skb->dev can be different to neigh's\nneigh->dev. For instance in case of bridging dnated skb from one veth to\nanother, the skb would be added to a neigh->arp_queue of the bridge.\n\nAs skb->dev can be reset back to nf_bridge->physindev and used, and as\nthere is no explicit mechanism that prevents this physindev from been\nfreed under us (for instance neigh_flush_dev doesn't cleanup skbs from\ndifferent device's neigh queue) we can crash on e.g. this stack:\n\narp_process\n neigh_update\n skb = __skb_dequeue(&neigh->arp_queue)\n neigh_resolve_output(..., skb)\n ...\n br_nf_dev_xmit\n br_nf_pre_routing_finish_bridge_slow\n skb->dev = nf_bridge->physindev\n br_handle_frame_finish\n\nLet's use plain ifindex instead of net_device link. To peek into the\noriginal net_device we will use dev_get_by_index_rcu(). Thus either we\nget device and are safe to use it or we don't get it and drop skb."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: bridge: reemplace physindev con physinif en nf_bridge_info. Se puede agregar un skb a neigh->arp_queue mientras se espera una respuesta de arp. Donde skb->dev del skb original puede ser diferente al neigh->dev de neigh. Por ejemplo, en el caso de unir un skb designado de un veth a otro, el skb se agregar\u00eda a un vecino->arp_queue del puente. Como skb->dev se puede restablecer a nf_bridge->physindev y usarse, y como no existe un mecanismo expl\u00edcito que impida que este physindev se libere bajo nuestra responsabilidad (por ejemplo, neigh_flush_dev no limpia skbs de la cola vecina de diferentes dispositivos), podemos crashear, por ejemplo, en esta pila: arp_process neigh_update skb = __skb_dequeue(&neigh->arp_queue) neigh_resolve_output(..., skb) ... br_nf_dev_xmit br_nf_pre_routing_finish_bridge_slow skb->dev = nf_bridge->physindev br_handle_frame_finish Usemos ifindex simple en lugar de enlace net_device. Para echar un vistazo al net_device original usaremos dev_get_by_index_rcu(). Por lo tanto, o obtenemos el dispositivo y podemos usarlo con seguridad o no lo obtenemos y eliminamos skb."}], "id": "CVE-2024-35839", "lastModified": "2024-05-17T18:35:35.070", "metrics": {}, "published": "2024-05-17T15:15:21.017", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/544add1f1cfb78c3dfa3e6edcf4668f6be5e730c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7ae19ee81ca56b13c50a78de6c47d5b8fdc9d97b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9325e3188a9cf3f69fc6f32af59844bbc5b90547"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9874808878d9eed407e3977fd11fee49de1e1d86"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"affected_release": [{"advisory": "RHSA-2024:5928", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.33.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-08-28T00:00:00Z"}, {"advisory": "RHSA-2024:5928", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.33.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-08-28T00:00:00Z"}, {"advisory": "RHSA-2024:6267", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "kernel-0:5.14.0-284.82.1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-09-04T00:00:00Z"}, {"advisory": "RHSA-2024:6268", "cpe": "cpe:/a:redhat:rhel_eus:9.2::nfv", "package": "kernel-rt-0:5.14.0-284.82.1.rt14.367.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-09-04T00:00:00Z"}], "bugzilla": {"description": "kernel: netfilter: bridge: replace physindev with physinif in nf_bridge_info", "id": "2281284", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2281284"}, "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": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnetfilter: bridge: replace physindev with physinif in nf_bridge_info\nAn skb can be added to a neigh->arp_queue while waiting for an arp\nreply. Where original skb's skb->dev can be different to neigh's\nneigh->dev. For instance in case of bridging dnated skb from one veth to\nanother, the skb would be added to a neigh->arp_queue of the bridge.\nAs skb->dev can be reset back to nf_bridge->physindev and used, and as\nthere is no explicit mechanism that prevents this physindev from been\nfreed under us (for instance neigh_flush_dev doesn't cleanup skbs from\ndifferent device's neigh queue) we can crash on e.g. this stack:\narp_process\nneigh_update\nskb = __skb_dequeue(&neigh->arp_queue)\nneigh_resolve_output(..., skb)\n...\nbr_nf_dev_xmit\nbr_nf_pre_routing_finish_bridge_slow\nskb->dev = nf_bridge->physindev\nbr_handle_frame_finish\nLet's use plain ifindex instead of net_device link. To peek into the\noriginal net_device we will use dev_get_by_index_rcu(). Thus either we\nget device and are safe to use it or we don't get it and drop skb."], "name": "CVE-2024-35839", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "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": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Under investigation", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Under investigation", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-35839\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-35839\nhttps://lore.kernel.org/linux-cve-announce/2024051756-CVE-2024-35839-4194@gregkh/T"], "threat_severity": "Moderate", "upstream_fix": "kernel 6.1.75, kernel 6.6.14, kernel 6.7.2, kernel 6.8"}