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CVE-2021-36976

Publication date 20 July 2021

Last updated 24 July 2024


Ubuntu priority

Cvss 3 Severity Score

6.5 · Medium

Score breakdown

libarchive 3.4.1 through 3.5.1 has a use-after-free in copy_string (called from do_uncompress_block and process_block).

Read the notes from the security team

Status

Package Ubuntu Release Status
libarchive 22.04 LTS jammy
Fixed 3.5.2-1ubuntu1
21.10 impish
Fixed 3.4.3-2ubuntu0.1
21.04 hirsute Ignored end of life
20.10 groovy Ignored end of life
20.04 LTS focal
Fixed 3.4.0-2ubuntu1.1
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

Notes


mdeslaur

introduced by: https://github.com/libarchive/libarchive/commit/47bb8187d3ef2d49ee8c7841cb2872b3cfa1f6f7 this was backported by the upstream-rar-window-mask.patch patch in focal

Patch details

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

Package Patch details
libarchive

Severity score breakdown

Parameter Value
Base score 6.5 · Medium
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-5291-1
    • libarchive vulnerabilities
    • 17 February 2022

Other references