CVE-2013-4163: Medium severity Linux Linux kernel vulnerability
Published Jul 23, 2013
·
Updated
Last updated 24 July 2024
Other sources
Linux kernel built with the IPv6 networking support is vulnerable to a crash
while appending data to an IPv6 socket with UDPCORKED option set. UDPCORK
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.
Red Hat would like to thank Hannes Frederic Sowa for reporting this issue.
— Red Hat
The ip6appenddatamtu function in net/ipv6/ip6output.c in the IPv6 implementation in the Linux kernel through 3.10.3 does not properly maintain information about whether the IPV6MTU 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 UDPCORK option in a setsockopt system call.
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