PT-2021-17852 · Debian · Courier-Authlib

Piccoro Mckay Lenz · Published 2021-03-15 · Updated 2021-05-17 · CVE-2021-28374

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: courier-authlib versions prior to 0.71.1-2

Description: The Debian courier-authlib package creates a /run/courier/authdaemon directory with weak permissions, allowing an attacker to read user information. This may include a cleartext password in some configurations, as well as the user's existence, uid and gids, home and/or Maildir directory, quota, and some type of password information, such as a hash.

Recommendations: For versions prior to 0.71.1-2, update to version 0.71.1-2 or later to resolve the issue. As a temporary workaround, consider restricting access to the /run/courier/authdaemon directory to minimize the risk of exploitation.

Fix

Incorrect Permission

Weakness Enumeration

CWE-732

Related Identifiers

CVE-2021-28374

DLA-2625-1

Affected Products

Courier-Authlib

References · 12

• https://osv.dev/vulnerability/DEBIAN-CVE-2021-28374 · Vendor Advisory
• https://bugs.debian.org/984810 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-28374 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-28374 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-28374 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-28374 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2625-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-28374 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-28374 · Security Note
• https://t.me/cvenotify/11325 · Telegram Post
• https://t.me/cibsecurity/24888 · Telegram Post
• https://lists.debian.org/debian-lts-announce/2021/04/msg00011.html · Note