#VU33191 Use-after-free in GraphicsMagick - CVE-2017-11403

Vulnerability identifier: #VU33191

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/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-2017-11403

CWE-ID: CWE-416

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 non-authenticated attacker to execute arbitrary code.

The ReadMNGImage function in coders/png.c in GraphicsMagick 1.3.26 has an out-of-order CloseBlob call, resulting in a use-after-free via a crafted file.

Mitigation
Install update from vendor's website.

Vulnerable software versions

GraphicsMagick: 1.3.26

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External links
https://hg.code.sf.net/p/graphicsmagick/code/rev/d0a76868ca37
https://blogs.gentoo.org/ago/2017/07/12/graphicsmagick-use-after-free-in-closeblob-blob-c/
https://lists.debian.org/debian-lts-announce/2018/08/msg00002.html
https://usn.ubuntu.com/4206-1/
https://www.debian.org/security/2018/dsa-4321

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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.