#VU16585 Improper input validation in GraphicsMagick - CVE-2018-20189

Vulnerability identifier: #VU16585

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-20189

CWE-ID: CWE-20

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 cause DoS condition on the target system.

The vulnerability exists due to an error in the ReadDIBImage function of coders/dib.c when processing malicious input in DIB reader. A remote attacker can cause the service to crash via a dib file that is crafted to appear with direct pixel values and also colormapping (which is not available beyond 8-bits/sample), and therefore lacks indexes initialization.

Mitigation
Install update from vendor's website.

Vulnerable software versions

GraphicsMagick: 1.3.31

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External links
https://hg.graphicsmagick.org/hg/GraphicsMagick/rev/648e2b406589
https://www.graphicsmagick.org/NEWS.html#june-15-2019

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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.