What’s Vulnerable › Vulnerabilities

CVE-2023-33958: Default `maxSignatureAttempts` in `notation verify` enables an endless data attack in notation

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-06-06 · updated 2026-06-17
• Weakness: CWE-400

Description

notation is a CLI tool to sign and verify OCI artifacts and container images. An attacker who has compromised a registry and added a high number of signatures to an artifact can cause denial of service of services on the machine, if a user runs notation verify command on the same machine. The problem has been fixed in the release v1.0.0-rc.6. Users should upgrade their notation packages to v1.0.0-rc.6 or above. Users unable to upgrade may restrict container registries to a set of secure and trusted container registries.

Affected products

• notaryproject notation-go: before 1.0.0; 1.0.0-rc1, 1.0.0-rc2, 1.0.0-rc3, 1.0.0-rc4, 1.0.0-rc5 — fixed in 1.0.0

How to fix

Upgrade to a fixed version: notaryproject notation-go 1.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/notaryproject/notation/releases/tag/v1.0.0-rc.6
• https://github.com/notaryproject/notation/security/advisories/GHSA-rvrx-rrwh-r9p6
• https://github.com/notaryproject/notation/releases/tag/v1.0.0-rc.6
• https://github.com/notaryproject/notation/security/advisories/GHSA-rvrx-rrwh-r9p6

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