CVE-2020-24916

Publication date 9 September 2020

Last updated 26 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

Description

CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.

From the Ubuntu Security Team

It was discovered that Yaws mishandled certain input when running CGI scripts. A remote attacker could use this vulnerability to execute arbitrary commands.

Status

Package Ubuntu Release Status
yaws 25.10 questing
Not affected
25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Not affected
20.10 groovy Ignored end of life
20.04 LTS focal
Vulnerable
18.04 LTS bionic
Fixed 2.0.4+dfsg-2ubuntu0.1
16.04 LTS xenial
Vulnerable
14.04 LTS trusty Not in release

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