TI-2024-19670 Aliases CVE-2024-29903 GHSA-95pr-fxf5-86gv

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

HIGH 66CWE-770Published 2024-04-10 · Updated 2024-08-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-770.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00851 58th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed cosign (sigstore): 2.2.4github.com/sigstore/cosign/v2 (Go): 2.2.4Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
sigstore	cosign	before 2.2.4	2.2.4	Patch available	CNA
—	github.com/sigstore/cosign (Go)	up to 2.2.3	—	No fix listed	GHSA-95pr-fxf5-86gv
—	github.com/sigstore/cosign/v2 (Go)	before 2.2.4	2.2.4	Patch available	GHSA-95pr-fxf5-86gv

cosign Vendorsigstore Affected before 2.2.4 Fixed in 2.2.4 Patch available CNA
github.com/sigstore/cosign (Go) Vendor— Affected up to 2.2.3 Fixed in — No fix listed GHSA-95pr-fxf5-86gv
github.com/sigstore/cosign/v2 (Go) Vendor— Affected before 2.2.4 Fixed in 2.2.4 Patch available GHSA-95pr-fxf5-86gv

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:sigstore:cosign::::::::	before 2.2.4	Vulnerable	sigstore

cpe:2.3:a:sigstore:cosign:*:*:*:*:*:*:*:* Versions before 2.2.4 Vulnerable ·sigstore

Remediation

Fix · CNA cosign (sigstore) Fixed in 2.2.4
Fix · GHSA-95pr-fxf5-86gv github.com/sigstore/cosign/v2 (Go) Fixed in 2.2.4 Advisory →

Red Hat 1 advisory

RHSA-2024:4836 Released 2024-07-24 · Red Hat rating Moderate
RHACS 4.5 enhancement and security update
- RHACS 4.5 for RHEL 8 advanced-cluster-security/rhacs-central-db-rhel8, advanced-cluster-security/rhacs-collector-rhel8, advanced-cluster-security/rhacs-collector-slim-rhel8 +10

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
OpenShift Pipelines version 1.15 for RHEL 8	Fixed	—
RHACS 4.5 for RHEL 8	Fixed	RHSA-2024:4836

Not affected: 1 product

Red Hat Advanced Cluster Security 3

Timeline

2026-10-02 Threatist record created from CVE-2024-29903
2026-10-03 Alias added: GHSA-95pr-fxf5-86gv

References

Other 4

TI-2022-16356 False positive signature verification in cosign CVSS 3.1CRITICAL 9.8
TI-2024-19669 Cosign vulnerable to system-wide denial of service via malicious attachments CVSS 3.1MEDIUM 5.9
TI-2022-16479 Vulnerabilities with blob verification in sigstore cosign CVSS 3.1MEDIUM 5.5
TI-2023-25220 Possible endless data attack from attacker-controlled registry in cosign CVSS 3.1MEDIUM 5.3
TI-2026-28380 Cosign's verify-blob-attestation reports false positive when payload parsing fails CVSS 3.1MEDIUM 5.3
TI-2026-18230 Cosign verification accepts any valid Rekor entry under certain conditions CVSS 3.1MEDIUM 5.5

See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences