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CVE-2021-3520

Publication date 30 April 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.

Status

Package Ubuntu Release Status
lz4 22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Fixed 1.9.3-1ubuntu0.1
20.10 groovy
Fixed 1.9.2-2ubuntu0.20.10.1
20.04 LTS focal
Fixed 1.9.2-2ubuntu0.20.04.1
18.04 LTS bionic
Fixed 0.0~r131-2ubuntu3.1
16.04 LTS xenial
14.04 LTS trusty

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Patch details

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

Package Patch details
lz4

Severity score breakdown

Parameter Value
Base score 9.8 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

Other references