Improper Certificate Validation in GNU GnuPG

1) Improper Certificate Validation

EUVDB-ID: #VU35025

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-2011-2207

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

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

dirmngr before 2.1.0 improperly handles certain system calls, which allows remote attackers to cause a denial of service (DOS) via a specially-crafted certificate.

Mitigation

Install update from vendor's website.

Vulnerable software versions

GnuPG: 2.0 - 2.0.30

External links

http://access.redhat.com/security/cve/cve-2011-2207
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=627377
http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-2207
http://security-tracker.debian.org/tracker/CVE-2011-2207
http://www.openwall.com/lists/oss-security/2011/06/15/6

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.