What’s Vulnerable › Vulnerabilities

CVE-2020-11765

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-04-14 · updated 2026-06-17
• Weakness: CWE-125

Description

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.

Affected products

• Apple iCloud for Windows: before 7.20; from 10.0 before 11.3 — fixed in 11.3, 7.20
• Apple iPadOS: before 13.6 — fixed in 13.6
• Apple Iphone Os: before 13.6 — fixed in 13.6
• Apple iTunes for Windows: before 12.10.8 — fixed in 12.10.8
• macOS: from 10.13.0 before 10.13.6; from 10.14.0 before 10.14.6; from 10.15 before 10.15.6; 10.13.6, 10.13.6-security_update_2018-002, 10.13.6-security_update_2018-003, 10.13.6-security_update_2019-001, 10.13.6-security_update_2019-002, 10.13.6-security_update_2019-003 (+20) — fixed in 10.13.6, 10.14.6, 10.15.6
• Apple tvOS: before 13.4.8 — fixed in 13.4.8
• Apple watchOS: before 6.2.8 — fixed in 6.2.8
• Canonical Ubuntu Linux: 16.04, 18.04, 19.10, 20.04
• Debian Linux: 9.0, 10.0
• Fedoraproject Fedora: 32
• AcademySoftwareFoundation openexr: before 2.4.1 — fixed in 2.4.1
• openSUSE Leap: 15.1

How to fix

Upgrade to a fixed version: Apple iCloud for Windows 11.3, 7.20; Apple iPadOS 13.6; Apple Iphone Os 13.6; Apple iTunes for Windows 12.10.8; macOS 10.13.6, 10.14.6, 10.15.6; Apple tvOS 13.4.8; Apple watchOS 6.2.8; AcademySoftwareFoundation openexr 2.4.1. Check the vendor advisory for mitigations.

References

• 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.debian.org/debian-lts-announce/2020/08/msg00056.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/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

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