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CVE-2021-20271: fedoraproject fedora

CVSS: 7.0v3.1HighModified
AliasesRHSA-2021:4771RHSA-2021:4785RHSA-2021:4975
Published 26-03-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-20271 is a high (CVSS 7.0) vulnerability in fedoraproject fedora. EPSS estimates a 0.77% chance of exploitation in the next 30 days, higher than 54.8% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.0/10
010
High · v3.1 (NVD)
EPSS score
0.77%
0%100%
Low · -0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 10 · Related 7
MGASA-2021-0167OPENSUSE-SU-2021:1366-1OPENSUSE-SU-2021:2682-1OPENSUSE-SU-2021:2685-1RHSA-2021:2574RHSA-2021:2791

Timeline

  1. 26-03-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

A flaw was found in RPM's signature check functionality when reading a package file. This flaw allows an attacker who can convince a victim to install a seemingly verifiable package, whose signature header was modified, to cause RPM database corruption and execute code. The highest threat from this vulnerability is to data integrity, confidentiality, and system availability.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.77%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

-0.02 pp

From 0.79% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.77%

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

Redhat12 products
  • enterprise_linux8.0
  • rpm< 0:4.11.3-35.el7_6.2 | < 0:4.11.3-48.el7_9 | < 0:4.11.3-40.el7_7.1
  • rpm-apidocs< 0:4.11.3-35.el7_6.2 | < 0:4.11.3-48.el7_9 | < 0:4.11.3-40.el7_7.1
  • rpm-build< 0:4.11.3-35.el7_6.2 | < 0:4.11.3-48.el7_9 | < 0:4.11.3-40.el7_7.1
  • rpm-build-libs< 0:4.11.3-35.el7_6.2 | < 0:4.11.3-48.el7_9 | < 0:4.11.3-40.el7_7.1
Debian1 product
  • rpm< 4.16.1.2+dfsg1-1
Fedoraproject1 product
Rpm1 product
  • rpm≥ 4.15.0, < 4.15.1.3 | ≥ 4.16.0, < 4.16.1.3 | 4.15.0:alpha | 4.15.0:beta1 | 4.15.0:rc1 | 4.16.0:alpha | 4.16.0:beta2 | 4.16.0:beta3 | 4.16.0:rc1
Starwindsoftware1 product
Ubuntu1 product
  • rpmAll versions (No fix recorded) | < 4.12.0.1+dfsg1-3ubuntu0.1~esm1 | < 4.14.1+dfsg1-2ubuntu0.1~esm1 | < 4.14.2.1+dfsg1-1ubuntu0.1~esm1

6 vendors · 17 products

References

20 links
Show all 20 references