CVE intelligence and bounded remediation

CVE-2017-12972 — Connect2Id Nimbus Jose+Jwt security vulnerability

High CVSS 7.5

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.

Severity
High
CVSS
7.5 (3.0)
Published
2017-08-20
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-345

Affected products

  • connect2id / nimbus_jose+jwt / 1.0
  • connect2id / nimbus_jose+jwt / 1.1
  • connect2id / nimbus_jose+jwt / 1.2
  • connect2id / nimbus_jose+jwt / 1.3
  • connect2id / nimbus_jose+jwt / 1.4
  • connect2id / nimbus_jose+jwt / 1.5

Showing 6 representative product identities from 127 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Supply-chain, dependency, build, and update integrity

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace affected packages, source archives, build actions, plugins, installers, and updates from declared source to deployed artifact.
  • Confirm provenance, signatures or digests, namespace ownership, lockfile resolution, registry configuration, and build-runner trust boundaries.
  • Inventory direct, transitive, vendored, generated, and bundled copies across releases and distribution channels.

Remediate safely

  • Move to a maintained trusted artifact or remove the dependency; pin immutable identities and verify provenance and integrity before use.
  • Regenerate lockfiles and artifacts in a clean isolated build, minimize build credentials and network access, and produce an updated software bill of materials.
  • Require reviewed update policy, protected publishing, and reproducible or independently attestable builds where supported.

Authoritative sources

Complete CVE record and remediation plan

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