#VU41356 Input validation error in Exim


Published: 2014-09-04 | Updated: 2020-08-10

Vulnerability identifier: #VU41356

Vulnerability risk: Medium

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2014-2972

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Exim
Server applications / Mail servers

Vendor: Exim

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

expand.c in Exim before 4.83 expands mathematical comparisons twice, which allows local users to gain privileges and execute arbitrary commands via a crafted lookup value.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Exim: 4.00 - 4.82


External links
http://git.exim.org/exim.git/commitdiff/7685ce68148a083d7759e78d01aa5198fc099c44
http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136251.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136264.html
http://www.ubuntu.com/usn/USN-2933-1
http://bugzilla.redhat.com/show_bug.cgi?id=1122552
http://lists.exim.org/lurker/message/20140722.145949.42c043f5.en.html
http://lists.exim.org/lurker/message/20140722.152452.d6c019e8.en.html
http://security.gentoo.org/glsa/201607-12


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


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