Vulnerability Description
In Nimbus JOSE+JWT before 4.39, there is no integer-overflow check when converting length values from bytes to bits, which allows attackers to conduct HMAC bypass attacks by shifting Additional Authenticated Data (AAD) and ciphertext so that different plaintext is obtained for the same HMAC.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Connect2Id | Nimbus Jose\+Jwt | 1.0 |
Related Weaknesses (CWE)
References
- https://bitbucket.org/connect2id/nimbus-jose-jwt/commits/0d2bd649ea386539220d4faThird Party Advisory
- https://bitbucket.org/connect2id/nimbus-jose-jwt/issues/224/byte-to-bit-overflowPatchThird Party Advisory
- https://bitbucket.org/connect2id/nimbus-jose-jwt/src/master/CHANGELOG.txtRelease NotesThird Party Advisory
- https://lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b667
- https://bitbucket.org/connect2id/nimbus-jose-jwt/commits/0d2bd649ea386539220d4faThird Party Advisory
- https://bitbucket.org/connect2id/nimbus-jose-jwt/issues/224/byte-to-bit-overflowPatchThird Party Advisory
- https://bitbucket.org/connect2id/nimbus-jose-jwt/src/master/CHANGELOG.txtRelease NotesThird Party Advisory
- https://lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b667
FAQ
What is CVE-2017-12972?
CVE-2017-12972 is a vulnerability with a CVSS score of 7.5 (HIGH). In Nimbus JOSE+JWT before 4.39, there is no integer-overflow check when converting length values from bytes to bits, which allows attackers to conduct HMAC bypass attacks by shifting Additional Authen...
How severe is CVE-2017-12972?
CVE-2017-12972 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-12972?
Check the references section above for vendor advisories and patch information. Affected products include: Connect2Id Nimbus Jose\+Jwt.