Vulnerability identifier: #VU32509

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-2014-4617

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 non-authenticated attacker to perform service disruption.

The do_uncompress function in g10/compress.c in GnuPG 1.x before 1.4.17 and 2.x before 2.0.24 allows context-dependent attackers to cause a denial of service (infinite loop) via malformed compressed packets, as demonstrated by an a3 01 5b ff byte sequence.

Mitigation
Install update from vendor's website.

Vulnerable software versions

GnuPG: 1.0.0 - 1.4.16

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External links
http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=014b2103fcb12f261135e3954f26e9e07b39e342
http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=11fdfcf82bd8d2b5bc38292a29876e10770f4b0a
http://lists.gnupg.org/pipermail/gnupg-announce/2014q2/000344.html
http://lists.gnupg.org/pipermail/gnupg-announce/2014q2/000345.html
http://lists.opensuse.org/opensuse-updates/2014-07/msg00010.html
http://secunia.com/advisories/59213
http://secunia.com/advisories/59351
http://secunia.com/advisories/59534
http://secunia.com/advisories/59578
http://www.debian.org/security/2014/dsa-2967
http://www.debian.org/security/2014/dsa-2968
http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
http://www.ubuntu.com/usn/USN-2258-1

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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.