| Summary: | Kernel : net: fib: fib6_add: potential NULL pointer dereference (CVE-2013-6431) | ||
|---|---|---|---|
| Product: | Gentoo Security | Reporter: | Agostino Sarubbo <ago> |
| Component: | Kernel | Assignee: | Gentoo Kernel Security <security-kernel> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | kernel |
| Priority: | Normal | ||
| Version: | unspecified | ||
| Hardware: | All | ||
| OS: | Linux | ||
| URL: | https://bugzilla.redhat.com/show_bug.cgi?id=1039054 | ||
| Whiteboard: | |||
| Package list: | Runtime testing required: | --- | |
CVE-2013-6431 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-6431): The fib6_add function in net/ipv6/ip6_fib.c in the Linux kernel before 3.11.5 does not properly implement error-code encoding, which allows local users to cause a denial of service (NULL pointer dereference and system crash) by leveraging the CAP_NET_ADMIN capability for an IPv6 SIOCADDRT ioctl call. Fix in 3.11.5 onwards |
From ${URL} : Linux kernel built with the IPv6 protocol(CONFIG_IPv6) along with the IPv6 source address based routing support(CONFIG_IPV6_SUBTREE) is vulnerable to a NULL pointer dereference flaw. It could occur while doing an ioctl(SIOCADDRT) call on an IPv6 socket. User would need to have CAP_NET_ADMIN privileges to perform such a call. A user/program with CAP_NET_ADMIN privileges could use this flaw to crash a system resulting in DoS. Upstream fix: ------------- -> https://git.kernel.org/linus/ae7b4e1f213aa659aedf9c6ecad0bf5f0476e1e2