Input validation error in GNU GnuPG

1) Input validation error

EUVDB-ID: #VU43156

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2012-6085

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate or delete data.

The read_block function in g10/import.c in GnuPG 1.4.x before 1.4.13 and 2.0.x through 2.0.19, when importing a key, allows remote attackers to corrupt the public keyring database or cause a denial of service (application crash) via a crafted length field of an OpenPGP packet.

Mitigation

Install update from vendor's website.

Vulnerable software versions

GnuPG: 1.4.0 - 2.0.19

External links

http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commitdiff;h=f0b33b6fb8e0586e9584a7a409dcc31263776a67
http://lists.fedoraproject.org/pipermail/package-announce/2013-January/095513.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-January/095516.html
http://rhn.redhat.com/errata/RHSA-2013-1459.html
http://www.mandriva.com/security/advisories?name=MDVSA-2013:001
http://www.openwall.com/lists/oss-security/2013/01/01/6
http://www.securityfocus.com/bid/57102
http://www.ubuntu.com/usn/USN-1682-1
http://bugs.g10code.com/gnupg/issue1455
http://bugzilla.redhat.com/show_bug.cgi?id=891142
http://exchange.xforce.ibmcloud.com/vulnerabilities/80990

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.