#VU21077 Stack-based buffer overflow in ImageMagick - CVE-2019-13305

Vulnerability identifier: #VU21077

Vulnerability risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/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-2019-13305

CWE-ID: CWE-121

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 execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in WritePNMImage in the coders/pnm.c file because of a misplaced "strncpy" and "an off-by-one" error. A remote attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

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/29efd648f38b73a64d73f14cd2019d869a585888
https://github.com/ImageMagick/ImageMagick/issues/1613
https://github.com/ImageMagick/ImageMagick6/commit/5c7fbf9a14fb83c9685ad69d48899f490a37609d

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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.