PT-2021-21943 · Unknown+1 · Courier Mail Server+1

Published 2021-08-03 · Updated 2021-09-09 · CVE-2021-38084

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: Courier Mail Server versions prior to 1.1.5

Description: An issue in the POP3 component allows meddler-in-the-middle attackers to pipeline commands after the POP3 STLS command, injecting plaintext commands into an encrypted user session.

Recommendations: For versions prior to 1.1.5, update to version 1.1.5 or later to resolve the issue. As a temporary workaround, consider restricting access to the POP3 component until the update is applied.

Fix

Special Elements Injection

Weakness Enumeration

CWE-74

Related Identifiers

CVE-2021-38084

Affected Products

Courier Mail Server

Debian

References · 11

• https://osv.dev/vulnerability/CVE-2021-38084 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-38084 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-38084 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-38084 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-38084 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-38084 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-38084 · Vendor Advisory
• https://t.me/cvenotify/18599 · Telegram Post
• https://sourceforge.net/p/courier/mailman/courier-imap/thread/cone.1382574216.483027.8082.1000%40monster.email-scan.com/#msg31555583 · Note
• https://t.me/cvenotify/18581 · Telegram Post
• https://sourceforge.net/p/courier/mailman/message/37329216 · Note