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Security Advisories: GSA_kwCzR0hTQS0ycXA5LXdnMjctOXBjds4AAQ1M

Nimbus JOSE+JWT missing overflow check

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.

Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 1 year ago
Updated: 8 months ago

CVSS Score: 7.5
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Identifiers: GHSA-2qp9-wg27-9pcv, CVE-2017-12972

Affected Packages

Versions: < 4.39
Fixed in: 4.39