CVE-2021-20309

Publication date 11 May 2021

Last updated 18 August 2025

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

A flaw was found in ImageMagick in versions before 7.0.11 and before 6.9.12, where a division by zero in WaveImage() of MagickCore/visual-effects.c may trigger undefined behavior via a crafted image file submitted to an application using ImageMagick. The highest threat from this vulnerability is to system availability.

Read the notes from the security team

Status

Package Ubuntu Release Status
imagemagick 25.10 questing
Fixed 8:6.9.11.60+dfsg-1.3ubuntu1
25.04 plucky
Fixed 8:6.9.11.60+dfsg-1.3ubuntu1
24.10 oracular
Fixed 8:6.9.11.60+dfsg-1.3ubuntu1
24.04 LTS noble
Fixed 8:6.9.11.60+dfsg-1.3ubuntu1
23.10 mantic
Fixed 8:6.9.11.60+dfsg-1.3ubuntu1
23.04 lunar
Fixed 8:6.9.11.60+dfsg-1.3ubuntu1
22.10 kinetic
Fixed 8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1
22.04 LTS jammy
Fixed 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.1+esm1
21.10 impish Ignored end of life
21.04 hirsute Ignored end of life
20.10 groovy Ignored end of life
20.04 LTS focal
Fixed 8:6.9.10.23+dfsg-2.1ubuntu11.9
18.04 LTS bionic
Fixed 8:6.9.7.4+dfsg-16ubuntu6.12
16.04 LTS xenial
Fixed 8:6.8.9.9-7ubuntu5.16+esm1
14.04 LTS trusty
Fixed 8:6.7.7.10-6ubuntu3.13+esm1

Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

Get Ubuntu Pro 30-day free trial

Notes

rayveldkamp

imagemagick is in universe from focal onwards

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
imagemagick

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-5158-1
    • ImageMagick vulnerabilities
    • 29 November 2021
    • USN-5736-1
    • ImageMagick vulnerabilities
    • 24 November 2022
    • USN-5736-2
    • ImageMagick vulnerabilities
    • 24 November 2022
    • USN-6200-1
    • ImageMagick vulnerabilities
    • 4 July 2023

Other references