REDHAT-BUG-2419056: High severity Fulcio Fulcio vulnerability
Fulcio is a free-to-use certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Prior to 1.8.3, function identity.extractIssuerURL splits (via a call to strings.Split) its argument (which is untrusted data) on periods. As a result, in the face of a malicious request with an (invalid) OIDC identity token in the payload containing many period characters, a call to extractIssuerURL incurs allocations to the tune of O(n) bytes (where n stands for the length of the function's argument), with a constant factor of about 16. This vulnerability is fixed in 1.8.3.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Fulcioto a version that resolves this vulnerability.Fixed in 1.8.3
Event History
Frequently Asked Questions
What is the severity of REDHAT-BUG-2419056?
The severity of REDHAT-BUG-2419056 is classified as high with a score of 7.
What are the potential impacts of REDHAT-BUG-2419056?
REDHAT-BUG-2419056 can lead to security vulnerabilities due to improper handling of untrusted data, potentially allowing for malicious exploitation.
How do I fix REDHAT-BUG-2419056?
To fix REDHAT-BUG-2419056, upgrade to Fulcio version 1.8.3 or later, where the vulnerability has been addressed.
What software is affected by REDHAT-BUG-2419056?
The affected software for REDHAT-BUG-2419056 is Fulcio.
Why is REDHAT-BUG-2419056 considered a risk?
REDHAT-BUG-2419056 is considered a risk because it exposes the system to potential unauthorized access through code signing vulnerabilities.