VulnerabilityModified
CVE-2021-20319
An improper signature verification vulnerability was found in coreos-installer.
HIGH 7.8EPSS 0.52%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.52% probability · 43th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-347
- Affected
- redhat/coreos-installer
- Source
- secalert@redhat.com
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2011862Issue Tracking, Vendor Advisory
- https://github.com/coreos/coreos-installer/pull/659/commits/ad243c6f0eff2835b2da56ca5f7f33af76253c89Patch, Third Party Advisory
- https://github.com/coreos/coreos-installer/security/advisories/GHSA-3r3g-g73x-g593Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2011862Issue Tracking, Vendor Advisory
- https://github.com/coreos/coreos-installer/pull/659/commits/ad243c6f0eff2835b2da56ca5f7f33af76253c89Patch, Third Party Advisory
- https://github.com/coreos/coreos-installer/security/advisories/GHSA-3r3g-g73x-g593Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.