The iucv_sock_recvmsg function in net/iucv/af_iucv.c in the Linux kernel before...

Vulnerability Description

The iucv_sock_recvmsg function in net/iucv/af_iucv.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call.

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a5598bd9c087dc0efc250a5221e5d0e6f584ee88
• http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00018.html
• http://www.mandriva.com/security/advisories?name=MDVSA-2013:176
• http://www.ubuntu.com/usn/USN-1837-1
• https://lkml.org/lkml/2013/4/14/107
• http://www.openwall.com/lists/oss-security/2013/04/14/3
• https://github.com/torvalds/linux/commit/a5598bd9c087dc0efc250a5221e5d0e6f584ee88
• http://lists.opensuse.org/opensuse-updates/2013-12/msg00129.html
• http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00016.html