Description
OpenBSD 4.2 allows local users to cause a denial of service (kernel panic) by calling the SIOCGIFRTLABEL IOCTL on an interface that does not have a route label, which triggers a NULL pointer dereference when the return value from the rtlabel_id2name function is not checked.
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
- OpenBSD 4.2 - 'rtlabel_id2name()' Local Null Pointer Dereference Denial of Service EDB-4935 · dos · Jan 18, 2008 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 27252 vdb-entry
- 4935 exploit
- [4.2] 20080111 005: RELIABILITY FIX: January 11, 2008 vendor-advisory
- 28473 third-party-advisory
- 1019188 vdb-entry
- [openbsd-security-announce] 20080111 errata 005 for OpenBSD 4.2: local users can provoke a kernel panic mailing-list