SB2011012801 - Two privilege escalation vulnerabilities in Exim

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Privilege escalation (CVE-ID: CVE-2011-0017)

The vulnerability allows a local user to escalate privileges on the vulnerable system.

The vulnerability exists due to Exim implementation on Linux system does not check return values from the setuid()/setgid() system calls. A local user can execute arbitrary commands on the system with root privileges.

Successful exploitation of this vulnerability will allow a local user to gain root privileges on the system.

2) Privilege escalation (CVE-ID: CVE-2010-4345)

The vulnerability allows a local user to escalate privileges on vulnerable system.

The vulnerability exists due to design error in Exim, when allowing local users to load arbitrary configuration file via the "spool_directory" directive. A local user can specify an alternate configuration file with a directive that contains arbitrary commands and execute arbitrary commands on the system with root privileges.

Successful exploitation of this vulnerability will allow a local user to gain root privileges on the system.

Remediation

Install update from vendor's website.

References

• https://github.com/Exim/exim/wiki/EximSecurity