Description
suidperl (aka sperl) does not properly cleanse the escape sequence "~!" before calling /bin/mail to send an error report, which allows local users to gain privileges by setting the "interactive" environmental variable and calling suidperl with a filename that contains the escape sequence.
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 2
- SUIDPerl 5.00503 - Mail Shell Escape (1) EDB-20141 · local · Aug 7, 2000 · verified
- SUIDPerl 5.00503 - Mail Shell Escape (2) EDB-20142 · local · Aug 7, 2000 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- TLSA2000018-1 vendor-advisory
- 1547 vdb-entry
- RHSA-2000:048 vendor-advisory
- CSSA-2000-026.0 vendor-advisory
- 20000808 MDKSA-2000:031 perl update mailing-list
- 20000814 Trustix Security Advisory - perl and mailx mailing-list
- 20000805 sperl 5.00503 (and newer ;) exploit mailing-list
- 20000810 Security Hole in perl, all versions vendor-advisory
- 20000810 Conectiva Linux security announcemente - PERL mailing-list