CVE-2019-9153 — Improper Verification of a Cryptographic Signature in OpenPGP
Improper Verification of a Cryptographic Signature in OpenPGP.js <=4.1.2 allows an attacker to forge signed messages by replacing its signatures with a "standalone" or "timestamp" signature.
Published
2019-08-22T15:30:33.000Z
Last modified
2024-08-04T21:38:46.485Z
01What is this vulnerability?
Improper Verification of a Cryptographic Signature in OpenPGP.js <=4.1.2 allows an attacker to forge signed messages by replacing its signatures with a "standalone" or "timestamp" signature.
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / n/a | n/a |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2019-08-22T15:30:33.000Z
- Last modified: 2024-08-04T21:38:46.485Z
09References
- sec-consult.com — https://sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-openpgp-j…
- www.bsi.bund.de — https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvel…
- github.com — https://github.com/openpgpjs/openpgpjs/releases/tag/v4.2.0
- github.com — https://github.com/openpgpjs/openpgpjs/pull/816
- github.com — https://github.com/openpgpjs/openpgpjs/pull/797/commits/327d3e5392a6f59a4270569d…
- packetstormsecurity.com — http://packetstormsecurity.com/files/154191/OpenPGP.js-4.2.0-Signature-Bypass-In…
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