Off-by-one in OpenEXR - CVE-2020-11765
Published: April 15, 2020 / Updated: August 8, 2020
Vulnerability identifier: #VU34469
CSH Severity: Medium
CVSS v4.0: 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-2020-11765
CWE-ID: CWE-193
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenEXR
Affected software:
OpenEXR
OpenEXR
Detailed vulnerability 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. There is an off-by-one error in use of the ImfXdr.h read function by DwaCompressor::Classifier::Classifier, leading to an out-of-bounds read.
How to mitigate CVE-2020-11765
Install update from vendor's website.
Sources
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00051.html
- 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/