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AUSCERT External Security Bulletin Redistribution
ESB-2006.0110 -- [UNIX/Linux]
PAM-MySQL 0.6.2 and 0.7pre3 fix double free vulnerability
10 February 2006
AusCERT Security Bulletin Summary
Product: PAM-MySQL 0.6.1 and prior
PAM-MySQL 0.7pre2 and prior
Operating System: UNIX variants (UNIX, Linux)
Impact: Execute Arbitrary Code/Commands
Denial of Service
CVE Names: CVE-2006-0056
Original Bulletin: http://www.kb.cert.org/vuls/id/693909
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US-CERT Vulnerability Note VU#693909
PAM-MySQL contains a double free vulnerability
PAM-MySQL contains a double-free vulnerability that may allow a remote
attacker to execute arbitrary code or cause a denial-of-service condition.
PAM-MySQL provides a Pluggable Authentication Module (PAM) interface to
a MySQL database. PAM-MySQL does not securely handle a pointer returned
by the pam_get_item() routine resulting in a double-free vulnerability.
The vulnerability exists if the following conditions are present:
1. Two or more PAM modules are stacked.
2. The PAM-MySQL module is not the first in the stack.
3. Any of the modules preceding the PAM-MySQL module are not marked as requisite.
If a remote attacker supplies a specially crafted password to a
vulnerable PAM-MySQL installation that attacker may be able to crash
the PAM-MySQL process. Please note that it may be possible to exploit
this vulnerability to execute arbitrary code.
Upgrading to PAM-MySQL version 0.6.2 or PAM-MySQL version 0.7pre3 will correct this issue.
No Information Available
This vulnerability was reported by Moriyoshi Koizumi.
This document was written by Jeff Gennari.
Date Public 09/28/2005
Date First Published 02/08/2006 09:05:56 PM
Date Last Updated 02/08/2006
CVE Name CVE-2006-0056
Document Revision 30
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