Vulnerability identifier: #VU341

Vulnerability risk: Low

CVSSv3.1: 6 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:H/RL:O/RC:C]

CVE-ID: CVE-2010-4345

CWE-ID: CWE-78

Exploitation vector: Local

Exploit availability: Yes

Vulnerable software:
Exim
Server applications / Mail servers

Vendor: Exim

Description

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.

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?

Yes. This vulnerability is being exploited in the wild.