Description
The sctp_getsockopt_assoc_stats function in net/sctp/socket.c in the Linux kernel before 3.8.4 does not validate a size value before proceeding to a copy_from_user operation, which allows local users to gain privileges via a crafted application that contains an SCTP_GET_ASSOC_STATS getsockopt system call.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Linux Kernel - 'SCTP_GET_ASSOC_STATS()' Stack Buffer Overflow (PoC) EDB-24747 · dos · Mar 13, 2013
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- http://twitter.com/grsecurity/statuses/309805924749541376
- 24747 exploit
- https://bugzilla.redhat.com/show_bug.cgi?id=919315
- [oss-security] 20130307 Re: CVE Request -- Linux kernel: sctp: SCTP_GET_ASSOC_STATS stack overflow mailing-list
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=726bc6b092da4c093eb74d13c07184b18c1af0f1
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.4
- http://grsecurity.net/~spender/sctp.c
- https://github.com/torvalds/linux/commit/726bc6b092da4c093eb74d13c07184b18c1af0f1