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TI-2021-03562 Aliases CVE-2021-20271GHSA-77pm-gxx7-5c5f

Insufficient verification of data authenticity in rpm

Priority LOW 32CWE-345Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 25 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-345.

Summary

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.

Why it matters now

EPSS 0.00772 55th percentileScored 2026-11-07
Fix Partial Red Hat: 5 advisoriesRed Hat: 25 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—rpmall versions—No fix listedCNA
  • rpm Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 13

CPEVersionsRoleVendor
cpe:2.3:a:rpm:rpm:*:*:*:*:*:*:*:*4.15.0 to before 4.15.1.3; 4.16.0 to before 4.16.1.3VulnerableRpm
cpe:2.3:a:rpm:rpm:4.15.0:alpha:*:*:*:*:*:*4.15.0 alphaVulnerableRpm
cpe:2.3:a:rpm:rpm:4.15.0:beta1:*:*:*:*:*:*4.15.0 beta1VulnerableRpm
cpe:2.3:a:rpm:rpm:4.15.0:rc1:*:*:*:*:*:*4.15.0 rc1VulnerableRpm
cpe:2.3:a:rpm:rpm:4.16.0:alpha:*:*:*:*:*:*4.16.0 alphaVulnerableRpm
cpe:2.3:a:rpm:rpm:4.16.0:beta2:*:*:*:*:*:*4.16.0 beta2VulnerableRpm
cpe:2.3:a:rpm:rpm:4.16.0:beta3:*:*:*:*:*:*4.16.0 beta3VulnerableRpm
cpe:2.3:a:rpm:rpm:4.16.0:rc1:*:*:*:*:*:*4.16.0 rc1VulnerableRpm
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*8.0VulnerableRed Hat
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*32VulnerableFedoraproject
  • cpe:2.3:a:rpm:rpm:*:*:*:*:*:*:*:* Versions 4.15.0 to before 4.15.1.3; 4.16.0 to before 4.16.1.3 Vulnerable ·Rpm
  • cpe:2.3:a:rpm:rpm:4.15.0:alpha:*:*:*:*:*:* Versions 4.15.0 alpha Vulnerable ·Rpm
  • cpe:2.3:a:rpm:rpm:4.15.0:beta1:*:*:*:*:*:* Versions 4.15.0 beta1 Vulnerable ·Rpm
  • cpe:2.3:a:rpm:rpm:4.15.0:rc1:*:*:*:*:*:* Versions 4.15.0 rc1 Vulnerable ·Rpm
  • cpe:2.3:a:rpm:rpm:4.16.0:alpha:*:*:*:*:*:* Versions 4.16.0 alpha Vulnerable ·Rpm
  • cpe:2.3:a:rpm:rpm:4.16.0:beta2:*:*:*:*:*:* Versions 4.16.0 beta2 Vulnerable ·Rpm
  • cpe:2.3:a:rpm:rpm:4.16.0:beta3:*:*:*:*:*:* Versions 4.16.0 beta3 Vulnerable ·Rpm
  • cpe:2.3:a:rpm:rpm:4.16.0:rc1:*:*:*:*:*:* Versions 4.16.0 rc1 Vulnerable ·Rpm
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
Show 3 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*34VulnerableFedoraproject
cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8:build14398:*:*:*:*:*:*v8 build14398VulnerableStarwindsoftware
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
  • cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8:build14398:*:*:*:*:*:* Versions v8 build14398 Vulnerable ·Starwindsoftware

Remediation

Red Hat 5 advisories

  • RHSA-2021:4975 Released 2021-12-07 · Red Hat rating Moderate
    rpm security update
    • Red Hat Enterprise Linux Server AUS (v. 7.7) rpm-4.11.3-40.el7_7.1, rpm-build-4.11.3-40.el7_7.1, rpm-build-libs-4.11.3-40.el7_7.1 +4
    • Red Hat Enterprise Linux Server E4S (v. 7.7) rpm-4.11.3-40.el7_7.1, rpm-build-4.11.3-40.el7_7.1, rpm-build-libs-4.11.3-40.el7_7.1 +4
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.7) rpm-apidocs-4.11.3-40.el7_7.1, rpm-cron-4.11.3-40.el7_7.1, rpm-plugin-systemd-inhibit-4.11.3-40.el7_7.1
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.7) rpm-apidocs-4.11.3-40.el7_7.1, rpm-cron-4.11.3-40.el7_7.1, rpm-plugin-systemd-inhibit-4.11.3-40.el7_7.1
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.7) rpm-apidocs-4.11.3-40.el7_7.1, rpm-cron-4.11.3-40.el7_7.1, rpm-plugin-systemd-inhibit-4.11.3-40.el7_7.1
    • Red Hat Enterprise Linux Server TUS (v. 7.7) rpm-4.11.3-40.el7_7.1, rpm-build-4.11.3-40.el7_7.1, rpm-build-libs-4.11.3-40.el7_7.1 +4
  • RHSA-2021:4785 Released 2021-11-23 · Red Hat rating Moderate
    rpm security update
    • Red Hat Enterprise Linux Client (v. 7) rpm-4.11.3-48.el7_9, rpm-build-4.11.3-48.el7_9, rpm-build-libs-4.11.3-48.el7_9 +2
    • Red Hat Enterprise Linux Client Optional (v. 7) rpm-apidocs-4.11.3-48.el7_9, rpm-cron-4.11.3-48.el7_9, rpm-devel-4.11.3-48.el7_9 +2
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) rpm-apidocs-4.11.3-48.el7_9, rpm-cron-4.11.3-48.el7_9, rpm-devel-4.11.3-48.el7_9 +2
    • Red Hat Enterprise Linux Server (v. 7) rpm-4.11.3-48.el7_9, rpm-build-4.11.3-48.el7_9, rpm-build-libs-4.11.3-48.el7_9 +7
    • Red Hat Enterprise Linux Server Optional (v. 7) rpm-apidocs-4.11.3-48.el7_9, rpm-cron-4.11.3-48.el7_9, rpm-plugin-systemd-inhibit-4.11.3-48.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) rpm-4.11.3-48.el7_9, rpm-build-4.11.3-48.el7_9, rpm-build-libs-4.11.3-48.el7_9 +4
    • Red Hat Enterprise Linux Workstation Optional (v. 7) rpm-apidocs-4.11.3-48.el7_9, rpm-cron-4.11.3-48.el7_9, rpm-plugin-systemd-inhibit-4.11.3-48.el7_9
  • RHSA-2021:4771 Released 2021-11-23 · Red Hat rating Moderate
    rpm security update
    • Red Hat Enterprise Linux Server AUS (v. 7.6) rpm-4.11.3-35.el7_6.2, rpm-build-4.11.3-35.el7_6.2, rpm-build-libs-4.11.3-35.el7_6.2 +4
    • Red Hat Enterprise Linux Server E4S (v. 7.6) rpm-4.11.3-35.el7_6.2, rpm-build-4.11.3-35.el7_6.2, rpm-build-libs-4.11.3-35.el7_6.2 +4
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.6) rpm-apidocs-4.11.3-35.el7_6.2, rpm-cron-4.11.3-35.el7_6.2, rpm-plugin-systemd-inhibit-4.11.3-35.el7_6.2
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.6) rpm-apidocs-4.11.3-35.el7_6.2, rpm-cron-4.11.3-35.el7_6.2, rpm-plugin-systemd-inhibit-4.11.3-35.el7_6.2
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.6) rpm-apidocs-4.11.3-35.el7_6.2, rpm-cron-4.11.3-35.el7_6.2, rpm-plugin-systemd-inhibit-4.11.3-35.el7_6.2
    • Red Hat Enterprise Linux Server TUS (v. 7.6) rpm-4.11.3-35.el7_6.2, rpm-build-4.11.3-35.el7_6.2, rpm-build-libs-4.11.3-35.el7_6.2 +4
Show 2 more Red Hat advisories
  • RHSA-2021:2791 Released 2021-07-20 · Red Hat rating Moderate
    rpm security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) rpm-build-4.14.2-38.el8_2
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) python3-rpm-4.14.2-38.el8_2, rpm-4.14.2-38.el8_2, rpm-apidocs-4.14.2-38.el8_2 +10
  • RHSA-2021:2574 Released 2021-06-29 · Red Hat rating Moderate
    rpm security update
    • Red Hat Enterprise Linux AppStream (v. 8) rpm-build-4.14.3-14.el8_4, rpm-plugin-fapolicyd-4.14.3-14.el8_4
    • Red Hat Enterprise Linux BaseOS (v. 8) python3-rpm-4.14.3-14.el8_4, rpm-4.14.3-14.el8_4, rpm-apidocs-4.14.3-14.el8_4 +10

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
7Server-RHMTC-1.4Fixed—
8Base-RHMTC-1.4Fixed—
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2021:2574
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2021:2791
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2021:2574
Red Hat Enterprise Linux BaseOS EUS (v. 8.2)Fixed RHSA-2021:2791
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2021:4785
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2021:4785
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2021:4785
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2021:4785
Red Hat Enterprise Linux Server AUS (v. 7.6)Fixed RHSA-2021:4771
Red Hat Enterprise Linux Server AUS (v. 7.7)Fixed RHSA-2021:4975
Red Hat Enterprise Linux Server E4S (v. 7.6)Fixed RHSA-2021:4771
Red Hat Enterprise Linux Server E4S (v. 7.7)Fixed RHSA-2021:4975
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2021:4785
Red Hat Enterprise Linux Server Optional AUS (v. 7.6)Fixed RHSA-2021:4771
Red Hat Enterprise Linux Server Optional AUS (v. 7.7)Fixed RHSA-2021:4975
Red Hat Enterprise Linux Server Optional E4S (v. 7.6)Fixed RHSA-2021:4771
Red Hat Enterprise Linux Server Optional E4S (v. 7.7)Fixed RHSA-2021:4975
Red Hat Enterprise Linux Server Optional TUS (v. 7.6)Fixed RHSA-2021:4771
Red Hat Enterprise Linux Server Optional TUS (v. 7.7)Fixed RHSA-2021:4975
Red Hat Enterprise Linux Server TUS (v. 7.6)Fixed RHSA-2021:4771
Red Hat Enterprise Linux Server TUS (v. 7.7)Fixed RHSA-2021:4975
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2021:4785
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2021:4785
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-20271
  2. 2026-10-03 Alias added: GHSA-77pm-gxx7-5c5f

References

Patch 2

Advisory 5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences