{"cve":"CVE-2025-62375","nvd":{"published":"2025-10-15T20:15:36.670","modified":"2026-10-08T11:10:00.250","status":"Deferred","description":"go-witness and witness are Go modules for generating attestations. In go-witness versions 0.8.6 and earlier and witness versions 0.9.2 and earlier the AWS attestor improperly verifies AWS EC2 instance identity documents. Verification can incorrectly succeed when a signature is not present or is empty, and when RSA signature verification fails. The attestor also embeds a single legacy global AWS public certificate and does not account for newer region specific certificates issued in 2024, making detection of forged documents difficult without additional trusted region data. An attacker able to supply or intercept instance identity document data (such as through Instance Metadata Service impersonation) can cause a forged identity document to be accepted, leading to incorrect trust decisions based on the attestation. This is fixed in go-witness 0.9.1 and witness 0.10.1. As a workaround, manually verify the included identity document, signature, and public key with standard tools (for example openssl) following AWS’s verification guidance, or disable use of the AWS attestor until upgraded.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":6.9},"cvss_v3":null,"cwes":["CWE-295"],"references":["https://github.com/in-toto/go-witness/commit/04ff20b600e28ce8fd1aa287534dd383a1cfefb9","https://github.com/in-toto/go-witness/security/advisories/GHSA-72c7-4g63-hpw5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:12:35.277909958+00:00"},"epss":{"cve":"CVE-2025-62375","score":0.00204,"percentile":0.10242,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-72c7-4g63-hpw5","url":"https://osv.dev/vulnerability/GHSA-72c7-4g63-hpw5","summary":"go-witness is Vulnerable to Improper Verification of AWS EC2 Identity Documents","modified":"2026-09-10T03:50:29.412220191Z","packages":[{"ecosystem":"Go","name":"github.com/in-toto/go-witness","purl":"pkg:golang/github.com/in-toto/go-witness","ranges":["<0.9.1"],"fixed":["0.9.1"]}]},{"id":"GO-2025-4028","url":"https://osv.dev/vulnerability/GO-2025-4028","summary":"go-witness is Vulnerable to Improper Verification of AWS EC2 Identity Documents in github.com/in-toto/go-witness","modified":"2026-02-04T03:05:11.731991Z","packages":[{"ecosystem":"Go","name":"github.com/in-toto/go-witness","purl":"pkg:golang/github.com/in-toto/go-witness","ranges":["<0.9.1"],"fixed":["0.9.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}