Advisory Published
CVE Published
Updated

CVE-2014-4667

First published: Fri Jun 27 2014(Updated: )

Description of the problem: For a TCP-style socket, while processing the COOKIE_ECHO chunk in sctp_sf_do_5_1D_ce(), after it has passed a series of sanity check, a new association would be created in sctp_unpack_cookie(), but afterwards, some processing maybe failed, and sctp_association_free() will be called to free the previously allocated association, in sctp_association_free(), sk_ack_backlog value is decremented for this socket, since the initial value for sk_ack_backlog is 0, after the decrement, it will be 65535, a wrap-around problem happens, and if we want to establish new associations afterward in the same socket, ABORT would be triggered since sctp deem the accept queue as full. A remote attacker can block further connection to the particular sctp server socket by sending a specially crafted sctp packet. Upstream patch: <a href="https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d3217b15a19a4779c39b212358a5c71d725822ee">https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d3217b15a19a4779c39b212358a5c71d725822ee</a> Acknowledgements: Red Hat would like to thank Gopal Reddy Kodudula of Nokia Siemens Networks for reporting this issue.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel<3.15.2
SUSE Linux Enterprise Desktop=11-sp3
Suse Linux Enterprise Real Time Extension=11-sp3
SUSE Linux Enterprise Server=10-sp4
SUSE Linux Enterprise Server=11-sp3
Suse Linux Enterprise Server=11-sp3
Canonical Ubuntu Linux=12.04
Debian Debian Linux=7.0
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.119-1
6.11.10-1
6.12.3-1

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