#VU34463 Integer overflow in OpenEXR - CVE-2020-11759

Vulnerability identifier: #VU34463

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-2020-11759

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenEXR
Client/Desktop applications / Multimedia software

Vendor: OpenEXR

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

An issue was discovered in OpenEXR before 2.4.1. Because of integer overflows in CompositeDeepScanLine::Data::handleDeepFrameBuffer and readSampleCountForLineBlock, an attacker can write to an out-of-bounds pointer.

Mitigation
Install update from vendor's website.

Vulnerable software versions

OpenEXR: 2.4.0

---

External links
https://bugs.chromium.org/p/project-zero/issues/detail?id=1987
https://github.com/AcademySoftwareFoundation/openexr/blob/master/CHANGES.md#version-241-february-11-2020
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v2.4.1
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F4KFGDQG5PVYAU7TS5MZ7XCS6EMPVII3/
https://usn.ubuntu.com/4339-1/

---

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.