CVE-2009-4146

Summary

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.

Affected Software

Weaknesses

• n/a

ADP Enrichment

CVE Program Container

Additional References

• http://www.securityfocus.com/bid/37154
• http://www.securityfocus.com/archive/1/508146/100/0/threaded
• http://secunia.com/advisories/37517
• http://people.freebsd.org/~cperciva/rtld.patch
• http://www.securityfocus.com/archive/1/508142/100/0/threaded
• http://www.securitytracker.com/id?1023250
• http://www.securityfocus.com/archive/1/508168/100/0/threaded
• http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html

References

• http://www.securityfocus.com/bid/37154
• http://www.securityfocus.com/archive/1/508146/100/0/threaded
• http://secunia.com/advisories/37517
• http://people.freebsd.org/~cperciva/rtld.patch
• http://www.securityfocus.com/archive/1/508142/100/0/threaded
• http://www.securitytracker.com/id?1023250
• http://www.securityfocus.com/archive/1/508168/100/0/threaded
• http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html

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