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CVE-2021-3639

Published: 4 August 2021

A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web application URL that redirects to an external and potentially malicious server. The highest threat from this liability is to confidentiality and integrity.

Priority

Medium

Cvss 3 Severity Score

6.1

Score breakdown

Status

Package Release Status
libapache2-mod-auth-mellon
Launchpad, Ubuntu, Debian
impish
Released (0.17.0-1ubuntu1)
jammy
Released (0.17.0-1ubuntu1)
bionic
Released (0.13.1-1ubuntu0.3)
focal
Released (0.16.0-1ubuntu0.1)
hirsute
Released (0.17.0-1ubuntu0.21.04.1)
trusty Does not exist

upstream Needs triage

xenial Needed

kinetic
Released (0.17.0-1ubuntu1)
lunar
Released (0.17.0-1ubuntu1)
mantic
Released (0.17.0-1ubuntu1)
Patches:
upstream: https://github.com/latchset/mod_auth_mellon/commit/42a11261b9dad2e48d70bdff7c53dd57a12db6f5

Severity score breakdown

Parameter Value
Base score 6.1
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N