CVE-2021-20319

Aliases:GHSA-3r3g-g73x-g593RUSTSEC-2022-0103RHSA-2021:3926RHSA-2021:3930RHSA-2021:3934RHSA-2021:4008
Advisory lineage Upstream: 0 Downstream: 5
Modified
Published: 04 Mar 2022, 17:05
Last modified:03 Aug 2024, 17:37

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.52% LOW
1% probability +0.42%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

04 Mar 2022, 17:05
Published
Vulnerability first disclosed
03 Aug 2024, 17:37
Last Modified
Vulnerability information updated

Description

An improper signature verification vulnerability was found in coreos-installer. A specially crafted gzip installation image can bypass the image signature verification and as a consequence can lead to the installation of unsigned content. An attacker able to modify the original installation image can write arbitrary data, and achieve full access to the node being installed.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
  • v2.0•MEDIUM•Score: 6.8AV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.52%• Percentile: 43%

Techniques & Countermeasures

  • CWE-347•Improper Verification of Cryptographic Signature

    The product does not verify, or incorrectly verifies, the cryptographic signature for data.

Affected Systems

  • Crates.Io•coreos-installer

    < 0.10.1

  • redhat•coreos-installer

    < 0.10.1

  • redhat•coreos-installer

    < 0:0.9.0-7.rhaos4.8.el8 | < 0:0.8.0-4.rhaos4.7.el8 | < 0:0.10.1-1.rhaos4.9.el8 | < 0:0.6.0-4.rhaos4.6.el8

  • redhat•coreos-installer-bootinfra

    < 0:0.9.0-7.rhaos4.8.el8 | < 0:0.8.0-4.rhaos4.7.el8 | < 0:0.10.1-1.rhaos4.9.el8 | < 0:0.6.0-4.rhaos4.6.el8

  • redhat•coreos-installer-bootinfra-debuginfo

    < 0:0.9.0-7.rhaos4.8.el8 | < 0:0.8.0-4.rhaos4.7.el8 | < 0:0.10.1-1.rhaos4.9.el8 | < 0:0.6.0-4.rhaos4.6.el8

  • redhat•coreos-installer-debuginfo

    < 0:0.9.0-7.rhaos4.8.el8 | < 0:0.8.0-4.rhaos4.7.el8 | < 0:0.10.1-1.rhaos4.9.el8 | < 0:0.6.0-4.rhaos4.6.el8

  • redhat•coreos-installer-debugsource

    < 0:0.9.0-7.rhaos4.8.el8 | < 0:0.8.0-4.rhaos4.7.el8 | < 0:0.10.1-1.rhaos4.9.el8 | < 0:0.6.0-4.rhaos4.6.el8

References (21)