7.5

CVE-2016-20011: gnome libgrss Improper Certificate Validation

CVSS: 7.5v3.1HighModified
AliasesMGASA-2021-0343UBUNTU-CVE-2016-20011DEBIAN-CVE-2016-20011
Published 25-05-2021Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2016-20011 is a high (CVSS 7.5) Improper Certificate Validation vulnerability in gnome libgrss. EPSS estimates a 1.43% chance of exploitation in the next 30 days, higher than 72.6% 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
1.43%
0%100%
Low · -0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 25-05-2021
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

libgrss through 0.7.0 fails to perform TLS certificate verification when downloading feeds, allowing remote attackers to manipulate the contents of feeds without detection. This occurs because of the default behavior of SoupSessionSync.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.43%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

-0.04 pp

From 1.47% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.43%

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

Mageia2 products
  • libgrss< 0.7.0-2.1.mga7
  • libgrss< 0.7.0-4.1.mga8
Debian1 product
  • libgrssAll versions (No fix recorded)
Gnome1 product
Ubuntu1 product
  • libgrssAll versions (No fix recorded)

4 vendors · 5 products

References

8 links