CVE-2014-2851

Integer overflow in the ping_init_sock function in net/ipv4/ping.c in the Linux kernel through 3.14.1 allows local users to cause a denial of service (use-after-free and system crash) or possibly gain privileges via a crafted application that leverages an improperly managed reference counter.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Potential Mitigations

References

• http://secunia.com/advisories/59386
• http://secunia.com/advisories/59599
• http://www.debian.org/security/2014/dsa-2926
• http://www.openwall.com/lists/oss-security/2014/04/11/4
• http://www.securityfocus.com/bid/66779
• http://www.securitytracker.com/id/1030769
• https://bugzilla.redhat.com/show_bug.cgi?id=1086730
• https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=b04c46190219a4f845e46a459e3102137b7f6cac
• https://lkml.org/lkml/2014/4/10/736
• http://secunia.com/advisories/59386
• http://secunia.com/advisories/59599
• http://www.debian.org/security/2014/dsa-2926
• http://www.openwall.com/lists/oss-security/2014/04/11/4
• http://www.securityfocus.com/bid/66779
• http://www.securitytracker.com/id/1030769
• https://bugzilla.redhat.com/show_bug.cgi?id=1086730
• https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=b04c46190219a4f845e46a459e3102137b7f6cac
• https://lkml.org/lkml/2014/4/10/736