Description
BSD pppd allows local users to change the permissions of arbitrary files via a symlink attack on a file that is specified as a tty device.
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
- FreeBSD 4.x / NetBSD 1.4.x/1.5.x/1.6 / OpenBSD 3 - pppd Arbitrary File Permission Modification Race Condition EDB-21669 · local · Jul 29, 2002 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 20020729 011: SECURITY FIX: July 29, 2002 vendor-advisory
- pppd-race-condition(9738) vdb-entry
- FreeBSD-SA-02:32.pppd vendor-advisory
- 5355 vdb-entry