#VU29247 Heap-based buffer overflow in Artifex jbig2dec - CVE-2020-12268

Vulnerability identifier: #VU29247

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-2020-12268

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Artifex jbig2dec
Client/Desktop applications / Multimedia software

Vendor: Artifex Software, Inc.

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the jbig2_image_compose() function in jbig2_image.c when processing JPEG files in Artifex jbig2dec. A remote attacker can pass specially crafted JPEG file to the application, trigger heap-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

Artifex jbig2dec : 0.1 - 0.17

---

External links
https://lists.opensuse.org/opensuse-security-announce/2020-05/msg00034.html
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20332
https://github.com/ArtifexSoftware/jbig2dec/commit/0726320a4b55078e9d8deb590e477d598b3da66e
https://github.com/ArtifexSoftware/jbig2dec/compare/0.17...0.18

---

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.