CVE-2021-29157

Publication date 21 June 2021

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

Description

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

CVSS version: CVSS v3.0

Base score 5.5 · Medium

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

Other references

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