The (1) BPF_S_ANC_NLATTR and (2) BPF_S_ANC_NLATTR_NEST extension
implementations in the sk_run_filter function in net/core/filter.c in
the Linux kernel through 3.14.3 do not check whether a certain length
value is sufficiently large, which allows local users to cause a
denial of service (integer underflow and system crash) via crafted BPF
instructions. NOTE: the affected code was moved to the
__skb_get_nlattr and __skb_get_nlattr_nest functions before the
vulnerability was announced.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[oss-security] 20140509 Re: CVE request Linux kernel: filter: prevent nla extensions to peek beyond the end of the message
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