Description
Race condition in the ptrace_attach function in kernel/ptrace.c in the Linux kernel before 2.6.30-rc4 allows local users to gain privileges via a PTRACE_ATTACH ptrace call during an exec system call that is launching a setuid application, related to locking an incorrect cred_exec_mutex object.
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 2.6.x (Gentoo 2.6.29rc1) - 'ptrace_attach' Local Privilege Escalation EDB-8673 · local · May 13, 2009 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- linux-kernel-ptraceattach-code-execution(50293) vdb-entry
- 20090516 rPSA-2009-0084-1 kernel mailing-list
- 54188 vdb-entry
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.30-rc4
- 35120 third-party-advisory
- [oss-security] 20090504 CVE request: kernel: ptrace_attach: fix the usage of ->cred_exec_mutex mailing-list
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=cad81bc2529ab8c62b6fdc83a1c0c7f4a87209eb
- ADV-2009-1236 vdb-entry
- 34799 vdb-entry
- http://wiki.rpath.com/Advisories:rPSA-2009-0084
- 34977 third-party-advisory