Input validation error in Dovecot

1) Input validation error

EUVDB-ID: #VU41607

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-2111

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The IMAP functionality in Dovecot before 2.2.2 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via invalid APPEND parameters.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Dovecot: 2.2 - 2.2.0

External links

http://secunia.com/advisories/53492
http://www.dovecot.org/list/dovecot-news/2013-May/000255.html
http://www.openwall.com/lists/oss-security/2013/05/24/1
http://www.securitytracker.com/id/1028585

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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