CVE Vulnerability

CVE-2021-20319

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.

6.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

7.8 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/coreos/coreos-installer/security/advisories/GHSA-3r3g-g73x-g593 Third Party Advisory
https://github.com/coreos/coreos-installer/pull/659/commits/ad243c6f0eff2835b2da56ca5f7f33af76253c89 Patch Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2011862 Issue Tracking Vendor Advisory
Configurations

Configuration 1

cpe:2.3:a:redhat:coreos-installer:*:*:*:*:*:*:*:*
Information

Published : 2022-03-04 06:15

Updated : 2022-03-11 03:37

NVD link : CVE-2021-20319

Mitre link : CVE-2021-20319

Products Affected
No products.
CWE
CWE-347

Improper Verification of Cryptographic Signature