#VU33239 NULL pointer dereference in GraphicsMagick - CVE-2017-11642

Vulnerability identifier: #VU33239

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-11642

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GraphicsMagick
Universal components / Libraries / Libraries used by multiple products

Vendor: GraphicsMagick Group

Description

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

The vulnerability exists due to a NULL pointer dereference error in the WriteMAPImage() function in coders/map.c when processing a non-colormapped image, a different vulnerability than CVE-2017-11638. A remote attacker can perform a denial of service (DoS) attack.

Mitigation
Update to version 1.3.27.

Vulnerable software versions

GraphicsMagick: 1.3.26

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External links
https://hg.code.sf.net/p/graphicsmagick/code/rev/29550606d8b9
https://www.securityfocus.com/bid/100395
https://lists.debian.org/debian-lts-announce/2018/08/msg00002.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PF62B5PJA2JDUOCKJGUQO3SPL74BEYSV/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WHIKB4TP6KBJWT2UIPWL5MWMG5QXKGEJ/
https://usn.ubuntu.com/4222-1/
https://www.debian.org/security/2018/dsa-4321

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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.