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{"acknowledgement": "Red Hat would like to thank Saran Neti (TELUS Security Labs) for reporting this issue.", "bugzilla": {"description": "kernel: net: large udp packet over IPv6 over UFO-enabled device with TBF qdisc panic", "id": "1030015", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1030015"}, "csaw": false, "cvss": {"cvss_base_score": "7.1", "cvss_scoring_vector": "AV:N/AC:M/Au:N/C:N/I:N/A:C", "status": "draft"}, "details": ["The udp6_ufo_fragment function in net/ipv6/udp_offload.c in the Linux kernel through 3.12, when UDP Fragmentation Offload (UFO) is enabled, does not properly perform a certain size comparison before inserting a fragment header, which allows remote attackers to cause a denial of service (panic) via a large IPv6 UDP packet, as demonstrated by use of the Token Bucket Filter (TBF) queueing discipline."], "name": "CVE-2013-4563", "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:/a:redhat:enterprise_mrg:2", "fix_state": "Not affected", "package_name": "realtime-kernel", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2013-10-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2013-4563\nhttps://nvd.nist.gov/vuln/detail/CVE-2013-4563"], "statement": "Not vulnerable.\nThis issue did not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.", "threat_severity": "Important"}