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{"acknowledgement": "Red Hat would like to thank Qian Zhang (Qihoo 360 Marvel Team) for reporting this issue.", "bugzilla": {"description": "kernel: TIPC subsystem: tipc_msg_build() doesn't validate MTU, may cause memory corruption.", "id": "1390832", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1390832"}, "csaw": false, "cvss": {"cvss_base_score": "6.8", "cvss_scoring_vector": "AV:L/AC:L/Au:S/C:C/I:C/A:C", "status": "draft"}, "cwe": "CWE-119", "details": ["The tipc_msg_build function in net/tipc/msg.c in the Linux kernel through 4.8.11 does not validate the relationship between the minimum fragment length and the maximum packet size, which allows local users to gain privileges or cause a denial of service (heap-based buffer overflow) by leveraging the CAP_NET_ADMIN capability.", "A flaw was found in the TIPC networking subsystem which could allow for memory corruption and possible privilege escalation. The flaw involves a system with an unusually low MTU (60) on networking devices configured as bearers for the TIPC protocol. An attacker could create a packet which will overwrite memory outside of allocated space and allow for privilege escalation."], "name": "CVE-2016-8632", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:enterprise_mrg:2", "fix_state": "Not affected", "package_name": "realtime-kernel", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2016-11-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-8632\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-8632"], "statement": "This issue is rated as important. The affected code is not enabled on Red Hat Enterprise Linux 6 and 7 or MRG-2 kernels. The commit introducing the comment was not included in Red Hat Enterprise Linux 5.", "threat_severity": "Moderate"}