Vulnerability identifier: #VU32529

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/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-2014-3430

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Dovecot
Server applications / Mail servers

Vendor: Dovecot

Description

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

Dovecot 1.1 before 2.2.13 and dovecot-ee before 2.1.7.7 and 2.2.x before 2.2.12.12 does not properly close old connections, which allows remote attackers to cause a denial of service (resource consumption) via an incomplete SSL/TLS handshake for an IMAP/POP3 connection.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Dovecot: 1.1 - 2.1.16

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External links
http://advisories.mageia.org/MGASA-2014-0223.html
http://dovecot.org/pipermail/dovecot-news/2014-May/000273.html
http://linux.oracle.com/errata/ELSA-2014-0790.html
http://permalink.gmane.org/gmane.mail.imap.dovecot/77499
http://rhn.redhat.com/errata/RHSA-2014-0790.html
http://secunia.com/advisories/59051
http://secunia.com/advisories/59537
http://secunia.com/advisories/59552
http://www.debian.org/security/2014/dsa-2954
http://www.mandriva.com/security/advisories?name=MDVSA-2015:113
http://www.openwall.com/lists/oss-security/2014/05/09/4
http://www.openwall.com/lists/oss-security/2014/05/09/8
http://www.securityfocus.com/bid/67306
http://www.ubuntu.com/usn/USN-2213-1

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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.