CVE-2021-28374
The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library creates a ...
The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library 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. In general, it includes the user's existence, uid and gids, home and/or Maildir directory, quota, and some type of password information (such as a hash).
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library 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. In general, it includes the user's existence, uid and gids, home and/or Maildir directory, quota, and some type of password information (such as a hash).
- Record
CVE-2021-28374- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-732
- Updated
- 2026-11-02
CVE List No score
The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library 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. In general, it includes the user's existence, uid and gids, home and/or Maildir directory, quota, and some type of password information (such as a hash).
- Record
CVE-2021-28374- Updated
- 2026-11-02
EUVDEUVD-2021-15057 No score
The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library 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. In general, it includes the user's existence, uid and gids, home and/or Maildir directory, quota, and some type of password information (such as a hash).
- Record
EUVD-2021-15057- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hcm8-3cv3-g73f
The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library creates a ...
The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library 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. In general, it includes the user's existence, uid and gids, home and/or Maildir directory, quota, and some type of password information (such as a hash).
- Record
GHSA-hcm8-3cv3-g73f- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-312
- Updated
- 2026-11-02
OSV
The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library 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. In general, it includes the user's existence, uid and gids, home and/or Maildir directory, quota, and some type of password information (such as a hash).
- Record
CVE-2021-28374- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-28374
The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library 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. In general, it includes the user's existence, uid and gids, home and/or Maildir directory, quota, and some type of password information (such as a hash).
- Record
DEBIAN-CVE-2021-28374- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-28374
The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library 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. In general, it includes the user's existence, uid and gids, home and/or Maildir directory, quota, and some type of password information (such as a hash).
- Record
UBUNTU-CVE-2021-28374- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
courier-authlibDebian:12 |
before 0.71.1-2 | 0.71.1-2 |
courier-authlibDebian:13 |
before 0.71.1-2 | 0.71.1-2 |
courier-authlibDebian:14 |
before 0.71.1-2 | 0.71.1-2 |
courier-authlibDebian:9 |
before 0.66.4-9+deb9u1, plus listed versions 0.66.4-9 |
0.66.4-9+deb9u1 |
courier-authlibUbuntu:16.04:LTS |
All versions, plus listed versions 0.66.1-10.66.4-20.66.4-30.66.4-3build1 |
None known |
courier-authlibUbuntu:18.04:LTS |
All versions, plus listed versions 0.68.0-3ubuntu10.68.0-40.68.0-4build10.68.0-4ubuntu0.1 |
None known |
courier-authlibUbuntu:20.04:LTS |
All versions, plus listed versions 0.69.0-2build20.69.0-2build3 |
None known |
courier-authlibUbuntu:22.04:LTS |
All versions, plus listed versions 0.71.1-2build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-28374 is a high vulnerability (CVSS 7.5) in Debian Courier-authlib, published March 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.27%, the 70th percentile. Fixed in courier-authlib 0.71.1-2.