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Test your applicationsUpgrade RHEL:7
kernel-debug
to version 0:3.10.0-123.4.2.el7 or higher.
This issue was patched in RHSA-2014:0786
.
Note: Versions mentioned in the description apply only to the upstream kernel-debug
package and not the kernel-debug
package as distributed by RHEL
.
See How to fix?
for RHEL:7
relevant fixed versions and status.
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.