CVE-2021-42097

Published: 21 October 2021

GNU Mailman before 2.1.35 may allow remote Privilege Escalation. A csrf_token value is not specific to a single user account. An attacker can obtain a value within the context of an unprivileged user account, and then use that value in a CSRF attack against an admin (e.g., for account takeover).

Priority

Cvss 3 Severity Score

8.0

Score breakdown

Status

Package	Release	Status
mailman Launchpad, Ubuntu, Debian	bionic	Released (1:2.1.26-1ubuntu0.4)
	focal	Released (1:2.1.29-1ubuntu3.1)
	upstream	Released (2.1.35)
	xenial	Released (1:2.1.20-1ubuntu0.6+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	Patches: upstream: https://bazaar.launchpad.net/~mailman-coders/mailman/2.1/revision/1873

Severity score breakdown

Parameter	Value
Base score	8.0
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

References

Bugs

Join the discussion

Canonical is offering Expanded Security Maintenance

Canonical is offering Ubuntu Expanded Security Maintenance (ESM) for security fixes and essential packages.

Find out more about ESM ›