CVE-2021-3639

Publication date 4 August 2021

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libapache2-mod-auth-mellon	24.10 oracular	Fixed 0.17.0-1ubuntu1
	24.04 LTS noble	Fixed 0.17.0-1ubuntu1
	23.10 mantic	Fixed 0.17.0-1ubuntu1
	23.04 lunar	Fixed 0.17.0-1ubuntu1
	22.10 kinetic	Fixed 0.17.0-1ubuntu1
	22.04 LTS jammy	Fixed 0.17.0-1ubuntu1
	21.10 impish	Fixed 0.17.0-1ubuntu1
	21.04 hirsute	Fixed 0.17.0-1ubuntu0.21.04.1
	20.04 LTS focal	Fixed 0.16.0-1ubuntu0.1
	18.04 LTS bionic	Fixed 0.13.1-1ubuntu0.3
	16.04 LTS xenial	Vulnerable
	14.04 LTS trusty	Not in release

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
libapache2-mod-auth-mellon	Upstream: 42a1126

Severity score breakdown

Parameter	Value
Base score	6.1 · Medium
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

References

Related Ubuntu Security Notices (USN)

USN-5069-1
mod-auth-mellon vulnerability
8 September 2021

USN-5069-2
mod-auth-mellon vulnerability
8 September 2021

Other references

https://www.cve.org/CVERecord?id=CVE-2021-3639