CVE-2011-1927 Information

Description

The ip_expire function in net/ipv4/ip_fragment.c in the Linux kernel before 2.6.39 does not properly construct ICMP_TIME_EXCEEDED packets after a timeout which allows remote attackers to cause a denial of service (invalid pointer dereference) via crafted fragmented packets.

Reference

http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=64f3b9e203bd06855072e295557dca1485a2ecba http://www.openwall.com/lists/oss-security/2011/05/18/2 https://github.com/torvalds/linux/commit/64f3b9e203bd06855072e295557dca1485a2ecba