10

CVE-2020-27780: linux-pam Improper Authentication

CVSS: 10.0v2.0HighModified
AliasesALPINE-CVE-2020-27780
Published 17-12-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-27780 is a high (CVSS 10.0) Improper Authentication vulnerability in linux-pam. EPSS estimates a 1.98% chance of exploitation in the next 30 days, higher than 80.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
10.0/10
010
High · v2.0 (NVD)
EPSS score
1.98%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2024:11140-1

Timeline

  1. 17-12-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

A flaw was found in Linux-Pam in versions prior to 1.5.1 in the way it handle empty passwords for non-existing users. When the user doesn't exist PAM try to authenticate with root and in the case of an empty password it successfully authenticate.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.98%

Chance of exploitation in the next 30 days

Percentile

80%

Versus all other CVEs

30-day change

0.00 pp

From 1.98% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.98%

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

Alpine1 product
  • linux-pam≥ 1.5.0, < 1.5.1 | ≥ 1.5.0, < 1.5.1-r0
Linux-pam1 product

2 vendors · 2 products

References

3 links