#VU21063 Out-of-bounds read in ImageMagick - CVE-2019-13295

Vulnerability identifier: #VU21063

Vulnerability risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-13295

CWE-ID: CWE-125

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 perform a denial of service (DoS) attack.

The vulnerability exists due to heap-based buffer over-read error in "AdaptiveThresholdImage" in the "MagickCore/threshold.c" file because a width of zero is mishandled. A remote attacker can trick the victim to open a specially crafted file, trigger out-of-bounds read error and crash the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ImageMagick: 7.0.8-50 Q16

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External links
https://github.com/ImageMagick/ImageMagick/commit/a7759f410b773a1dd57b0e1fb28112e1cd8b97bc
https://github.com/ImageMagick/ImageMagick/issues/1608
https://github.com/ImageMagick/ImageMagick6/commit/55e6dc49f1a381d9d511ee2f888fdc3e3c3e3953

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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.