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{"acknowledgement": "Red Hat would like to thank Lucas Leong (Trend Micro Zero Day Initiative) for reporting this issue.", "bugzilla": {"description": "kernel: ICMPv6 Router Advertisement packets, aka Linux TCP/IP Remote Code Execution Vulnerability", "id": "2250377", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2250377"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-362", "details": ["A race condition was found in the Linux Kernel. Under certain conditions, an unauthenticated attacker from an adjacent network could send an ICMPv6 router advertisement packet, causing arbitrary code execution.", "A race condition was found in the Linux Kernel. Under certain conditions, an unauthenticated attacker from an adjacent network could send an ICMPv6 router advertisement packet, causing arbitrary code execution."], "mitigation": {"lang": "en:us", "value": "The remote attack is potentially possible in the local network only. It is not possible if param\nnet.ipv6.conf.[NIC].accept_ra\ndisabled. Check this param value with the command\ncat /proc/sys/net/ipv6/conf/default/accept_ra\nor /proc/sys/net/ipv6/conf/eth0/accept_ra\n(where eth0 is the name of the networking interface).\nIf you cannot run this or a similar command and parameter accept_ra is not available, then IPV6 is disabled.\nIf IPV6 is not being used, it is possible to disable it completely, and there is instruction on how to do this:\nhttps://access.redhat.com/solutions/8709"}, "name": "CVE-2023-6200", "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": "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:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:rhev_hypervisor:4", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Virtualization 4"}], "public_date": "2023-12-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-6200\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-6200\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dade3f6a1e4e"], "statement": "To trigger this issue, the attacker must be on the local network, IPV6, and the parameter net.ipv6.conf must be enabled.[NIC].accept_ra enabled. By default, net.ipv6.conf.[NIC].accept_ra is disabled for Red Hat Enterprise Linux. In the default configuration, only local attacks are possible. The bug was introduced upstream by commit 3dec89b14d37 (\"net/ipv6: Remove expired routes with a separated list of routes.\").", "threat_severity": "Important"}