Title: Salim Gasmi GLD Postfix Greylisting Daemon Format String Vulnerability
Severity: CRITICAL
Description:
Salim Gasmi's GLD Postfix greylisting daemon is a standalone daemon designed to implement the greylisting protocol as described at http://www.greylisting.org.
It is reported that GLD contains a format string vulnerability. This issue is due to a failure of the application to properly sanitize user-supplied input data prior to using it in a formatted-printing function.
Specifically, in the 'cnf.c' file, in the 'ErrorLog()' function, there is a call to the 'syslog()' function that fails to properly sanitize user-supplied input data. The 'ErrorLog()' function is used in the 'server.c' file, in multiple places.
Remote attackers may exploit this vulnerability to cause arbitrary machine code to be executed in the context of the affected service. As the service is designed to be run as the superuser, remote attackers may gain superuser privileges on affected computers.
GLD version 1.4 is reportedly affected, but prior versions may also be affected.
Affected Products:
- Gentoo Linux
- Salim Gasmi GLD 1.0.0
- Salim Gasmi GLD 1.1.0
- Salim Gasmi GLD 1.2.0
- Salim Gasmi GLD 1.3.0
- Salim Gasmi GLD 1.3.1
- Salim Gasmi GLD 1.4.0
References:
- Salim Gasmi: GLD Home Page
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