CVE-2021-28662

Publication date 27 May 2021

Last updated 24 July 2024


Ubuntu priority

Cvss 3 Severity Score

6.5 · Medium

Score breakdown

An issue was discovered in Squid 4.x before 4.15 and 5.x before 5.0.6. If a remote server sends a certain response header over HTTP or HTTPS, there is a denial of service. This header can plausibly occur in benign network traffic.

Read the notes from the security team

Status

Package Ubuntu Release Status
squid 22.04 LTS jammy
Fixed 4.13-10ubuntu1
21.10 impish
Fixed 4.13-10ubuntu1
21.04 hirsute
Fixed 4.13-1ubuntu4.1
20.10 groovy
Fixed 4.13-1ubuntu2.2
20.04 LTS focal
Fixed 4.10-1ubuntu1.4
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
squid3 22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.10 groovy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release

Notes


mdeslaur

per upstream, all Squid older than 4.0 are not vulnerable.

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)

Other references