| Summary: | Kernel : net: panic while appending data to a corked IPv6 socket in ip6_append_data_mtu (CVE-2013-4163) | ||
|---|---|---|---|
| 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=987633 | ||
| Whiteboard: | |||
| Package list: | Runtime testing required: | --- | |
CVE-2013-4163 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-4163): The ip6_append_data_mtu function in net/ipv6/ip6_output.c in the IPv6 implementation in the Linux kernel through 3.10.3 does not properly maintain information about whether the IPV6_MTU setsockopt option had been specified, which allows local users to cause a denial of service (BUG and system crash) via a crafted application that uses the UDP_CORK option in a setsockopt system call. Fix in 3.10.4 onwards |
From ${URL} : Linux kernel built with the IPv6 networking support is vulnerable to a crash while appending data to an IPv6 socket with UDP_CORKED option set. UDP_CORK enables accumulating data and sending it as single datagram. An unprivileged user/program could use this flaw to crash the kernel, resulting in local DoS. Upstream fix: ============= -> https://git.kernel.org/linus/75a493e60ac4bbe2e977e7129d6d8cbb0dd236be