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CVE-2017-12972

Published: Aug 20, 2017Updated: May 13, 2026 Sources: CVE List NVD GHSA BDUCWE-345
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.9%
Top 45.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-345

Affected Products

Nimbus JOSE + JWTConnect2id Ltd.
Library
OSS Libraries / generic-library
nimbus jose\+jwtconnect2id
Library
OSS Libraries / maven
n/an/a
com.nimbusds:nimbus-jose-jwtMavenOSS Libraries
connect2id ltd.commercialOSS Libraries
connect2idoss-projectOSS Librariesaka nimbus jose+jwt, nimbus jose+jwt
mavenpackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://nvd.nist.gov/vuln/detail/CVE-2017-12972
nvd.nist.gov
https://vuldb.com/?id.105614
vuldb.com
https://bitbucket.org/connect2id/nimbus-jose-jwt/commits/0d2bd649ea386539220d4facfe1f65eb1dadb86c
bitbucket.org
and 5 more references View all →

Timeline

Published
Aug 20, 2017
Last Updated
May 13, 2026

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