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CVE-2021-43414: gnu hurd Improper Authentication

CVSS: 7.0v3.1HighModified
Published 07-11-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-43414 is a high (CVSS 7.0) Improper Authentication vulnerability in gnu hurd. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
38/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.0/10
010
High · v3.1 (NVD)
EPSS score
0.29%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 07-11-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered in GNU Hurd before 0.9 20210404-9. The use of an authentication protocol in the proc server is vulnerable to man-in-the-middle attacks, which can be exploited for local privilege escalation to get full root access.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

0.00 pp

From 0.29% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (lists.gnu.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Gnu1 product
  • hurd< 0.9.20210404-9

1 vendor · 1 product

References

2 links