Description
The _rtld function in the Run-Time Link-Editor (rtld) in libexec/rtld-elf/rtld.c in FreeBSD 7.1, 7.2, and 8.0 does not clear the LD_PRELOAD environment variable, which allows local users to gain privileges by executing a setuid or setguid program with a modified LD_PRELOAD variable containing an untrusted search path that points to a Trojan horse library, a different vector than CVE-2009-4147.
Metrics
CVSS 2.0 7.2/10
AV:L/AC:L/Au:N/C:C/I:C/A:CWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html
- http://people.freebsd.org/~cperciva/rtld.patchExploit
- http://secunia.com/advisories/37517Vendor Advisory
- http://www.securityfocus.com/archive/1/508142/100/0/threaded
- http://www.securityfocus.com/archive/1/508146/100/0/threaded
- http://www.securityfocus.com/archive/1/508168/100/0/threaded
- http://www.securityfocus.com/bid/37154Exploit
- http://www.securitytracker.com/id?1023250
- http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html
- http://people.freebsd.org/~cperciva/rtld.patchExploit
- http://secunia.com/advisories/37517Vendor Advisory
- http://www.securityfocus.com/archive/1/508142/100/0/threaded
- http://www.securityfocus.com/archive/1/508146/100/0/threaded
- http://www.securityfocus.com/archive/1/508168/100/0/threaded
- http://www.securityfocus.com/bid/37154Exploit
- http://www.securitytracker.com/id?1023250
Timeline
- Published
- Dec 2, 2009
- Last modified
- Jun 16, 2026
- NVD status
- Modified