#VU62861 Information disclosure in ImageMagick - CVE-2021-20313

Vulnerability identifier: #VU62861

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-20313

CWE-ID: CWE-200

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 gain access to potentially sensitive information.

The vulnerability exists due to potential cipher leak when calculating signatures in TransformSignature() function in MagickCore/signature.c. A remote attacker can gain unauthorized access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ImageMagick: 7.0.0-0, 7.0.1-0 - 7.0.10-62, 7.0.2-0 - 7.0.2-10, 7.0.3-0 - 7.0.3-10, 7.0.4-0 - 7.0.4-10, 7.0.5-0 - 7.0.5-10, 7.0.6 - 7.0.6-10, 7.0.7 - 7.0.7-39, 7.0.8-0 - 7.0.8-69, 7.0.9 - 7.0.9-27

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1947019
https://github.com/ImageMagick/ImageMagick/commit/70aa86f5d5d8aa605a918ed51f7574f433a18482

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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.