#VU12865 Heap-based buffer over-read in ImageMagick - CVE-2018-5248

Vulnerability identifier: #VU12865

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-5248

CWE-ID: CWE-126

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ImageMagick
Client/Desktop applications / Multimedia software

Vendor: ImageMagick.org

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in coders/sixel.c in the ReadSIXELImage function, related to the sixel_decode function, due to heap-based buffer over-read. A remote attacker can trick the victim into opening a specially crafted file, trigger memory corruption and cause the service to crash.

Mitigation
Install update from vendor's website.

Vulnerable software versions

ImageMagick: 7.0.7-17 Q16

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External links
https://github.com/ImageMagick/ImageMagick/issues/927

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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.