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Vulnerability · Published Apr 10, 2024 · Assigned by GitHub_M

CVE-2024-29903Cosign vulnerable to machine-wide denial of service via malicious artifacts

Medium 4.2

In plain English

A medium-severity resource allocation without limits in cosign from sigstore. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 58% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.2Medium
Exploit odds (30 days)0.9%top 41.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

Cosign provides code signing and transparency for containers and binaries. Prior to version 2.2.4, maliciously-crafted software artifacts can cause denial of service of the machine running Cosign thereby impacting all services on the machine. The root cause is that Cosign creates slices based on the number of signatures, manifests or attestations in untrusted artifacts. As such, the untrusted artifact can control the amount of memory that Cosign allocates. The exact issue is Cosign allocates excessive memory on the lines that creates a slice of the same length as the manifests. Version 2.2.4 contains a patch for the vulnerability.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Gogithub.com/sigstore/cosignno fix listedGHSA-95pr-fxf5-86gv
Gogithub.com/sigstore/cosignno fix listedGO-2024-2719
Gogithub.com/sigstore/cosign/v22.2.4GHSA-95pr-fxf5-86gv
Gogithub.com/sigstore/cosign/v22.2.4GO-2024-2719

Affected products (as reported)

VendorProductVersions
sigstore cosign < 2.2.4

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H

References