#VU21062 Out-of-bounds read in ImageMagick - CVE-2019-15141

Vulnerability identifier: #VU21062

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-2019-15141

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 a boundary condition in "WriteTIFFImage" within coders/tiff.c" file. A remote attacker can create a specially crafted TIFF image file, related to TIFFRewriteDirectory, TIFFWriteDirectory, TIFFWriteDirectorySec, and TIFFWriteDirectoryTagColormap in "tif_dirwrite.c" of LibTIFF, trick the victim into opening it, trigger out-of-bounds read error and crash the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ImageMagick: 7.0.8-43 Q16

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External links
https://github.com/ImageMagick/ImageMagick/issues/1560
https://github.com/ImageMagick/ImageMagick6/commit/3c53413eb544cc567309b4c86485eae43e956112

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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.