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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-11765
• 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.debian.org/debian-lts-announce/2020/08/msg00056.html
• https://lists.fedoraproject.org/archives/list/[email protected]/message/F4KFGDQG5PVYAU7TS5MZ7XCS6EMPVII3/
• https://security.gentoo.org/glsa/202107-27
• https://support.apple.com/kb/HT211288
• https://support.apple.com/kb/HT211289
• https://support.apple.com/kb/HT211290
• https://support.apple.com/kb/HT211291
• https://support.apple.com/kb/HT211293
• https://support.apple.com/kb/HT211294
• https://support.apple.com/kb/HT211295
• https://usn.ubuntu.com/4339-1/
• https://www.debian.org/security/2020/dsa-4755
• http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00051.html