Description
The convert-fcrontab program in fcron 3.0.0 might allow local users to gain privileges via a long command-line argument, which causes Linux glibc to report heap memory corruption, possibly because a strcpy in the strdup2 function can "overwrite some data."
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
- Fcron 3.0 - Convert-FCronTab Local Buffer Overflow EDB-27159 · dos · Feb 1, 2006 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 20060201 Fcrontab - memory corruption on heap. mailing-list
- http://fcron.free.fr/news.php#a20060206a.xml
- fcron-syslog-bo(24444) vdb-entry
- 20060201 Fcrontab - memory corruption on heap. mailing-list
- ADV-2006-0435 vdb-entry
- 2006-0036 vendor-advisory
- 18719 third-party-advisory
- 16467 vdb-entry
- https://bugs.trustix.org/show_bug.cgi?id=1754
- http://fcron.free.fr/doc/en/changes.html