CVE-2021-29157

Publication date 21 June 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

Dovecot before 2.3.15 allows ../ Path Traversal. An attacker with access to the local filesystem can trick OAuth2 authentication into using an HS256 validation key from an attacker-controlled location. This occurs during use of local JWT validation with the posix fs driver.

Read the notes from the security team

Status

Package Ubuntu Release Status
dovecot 22.04 LTS jammy
Fixed 2.3.13+dfsg1-1ubuntu2
21.10 impish
Fixed 2.3.13+dfsg1-1ubuntu2
21.04 hirsute
Fixed 1:2.3.13+dfsg1-1ubuntu1.1
20.10 groovy
Fixed 1:2.3.11.3+dfsg1-2ubuntu0.2
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

Notes

mdeslaur

per upstream, this affects 2.3.11-2.3.14

Severity score breakdown

Parameter Value
Base score 5.5 · Medium
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N