7.5

CVE-2021-28374: debian courier-authlib

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2021-28374DEBIAN-CVE-2021-28374DLA-2625-1
Published 15-03-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-28374 is a high (CVSS 7.5) vulnerability in debian courier-authlib. EPSS estimates a 1.27% chance of exploitation in the next 30 days, higher than 69.3% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
1.27%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-03-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

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).

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.27%

Chance of exploitation in the next 30 days

Percentile

69%

Versus all other CVEs

30-day change

0.00 pp

From 1.27% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian3 products
Ubuntu1 product
  • courier-authlibAll versions (No fix recorded)

2 vendors · 4 products

References

5 links