Vulnerabilities > CVE-2006-6164 - Local Environment Variable Clearing vulnerability in Openbsd 3.9/4.0
Attack vector
LOCAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
COMPLETE Integrity impact
COMPLETE Availability impact
COMPLETE Summary
The _dl_unsetenv function in loader.c in the ELF ld.so in OpenBSD 3.9 and 4.0 does not properly remove duplicate environment variables, which allows local users to pass dangerous variables such as LD_PRELOAD to loading processes, which might be leveraged to gain privileges.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 2 |
References
- http://secunia.com/advisories/22993
- http://securitytracker.com/id?1017253
- http://www.matasano.com/log/592/finger-79tcp-mcdonald-dowd-and-schuh-challenge-part-2/
- http://www.openbsd.org/errata.html#ldso
- http://www.openbsd.org/errata39.html#ldso
- http://www.securityfocus.com/archive/1/452371/100/0/threaded
- http://www.securityfocus.com/archive/1/452428/100/0/threaded
- http://www.securityfocus.com/bid/21188
- https://exchange.xforce.ibmcloud.com/vulnerabilities/30441