Vulnerability identifier: #VU342

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:O/RC:C]

CVE-ID: CVE-2011-0017

CWE-ID: CWE-78

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Exim
Server applications / Mail servers

Vendor: Exim

Description

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.

Mitigation
Update to version 4.73.

Vulnerable software versions

Exim: 4.70 - 4.72

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External links
http://github.com/Exim/exim/wiki/EximSecurity

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.