Vulnerability identifier: #VU84047

Vulnerability 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-2013-4402

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GnuPG
Client/Desktop applications / Encryption software

Vendor: GNU

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

GnuPG: 1.4.0 - 2.0.21

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External links
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=725433
http://lists.gnupg.org/pipermail/gnupg-announce/2013q4/000333.html
http://lists.gnupg.org/pipermail/gnupg-announce/2013q4/000334.html
http://lists.opensuse.org/opensuse-updates/2013-10/msg00020.html
http://lists.opensuse.org/opensuse-updates/2013-10/msg00025.html
http://rhn.redhat.com/errata/RHSA-2013-1459.html
http://www.debian.org/security/2013/dsa-2773
http://www.debian.org/security/2013/dsa-2774
http://www.ubuntu.com/usn/USN-1987-1
http://bugzilla.redhat.com/show_bug.cgi?id=1015685

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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.