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TI-2023-19073 Aliases CVE-2023-37464

Incorrect Authentication Tag length usage in AES GCM decryption in OpenIDC/cjose

Priority MEDIUM 44CWE-327Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-327.

Summary

OpenIDC/cjose is a C library implementing the Javascript Object Signing and Encryption (JOSE). The AES GCM decryption routine incorrectly uses the Tag length from the actual Authentication Tag provided in the JWE. The spec says that a fixed length of 16 octets must be applied. Therefore this bug allows an attacker to provide a truncated Authentication Tag and to modify the JWE accordingly. Users should upgrade to a version >= 0.6.2.2. Users unable to upgrade should avoid using AES GCM encryption and replace it with another encryption algorithm (e.g. AES CBC).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0071 53rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed cjose (OpenIDC): 0.6.2.2Red Hat: 7 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenIDCcjosebefore 0.6.2.20.6.2.2Patch availableCNA
  • cjose VendorOpenIDC Affected before 0.6.2.2 Fixed in 0.6.2.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cisco:cjose:*:*:*:*:*:*:*:*before 0.6.2.2VulnerableCisco
  • cpe:2.3:a:cisco:cjose:*:*:*:*:*:*:*:* Versions before 0.6.2.2 Vulnerable ·Cisco

Remediation

  • Fix · CNA cjose (OpenIDC) Fixed in 0.6.2.2

Red Hat 7 advisories

  • RHSA-2023:4429 Released 2023-08-02 · Red Hat rating Important
    mod_auth_openidc:2.3 security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) cjose-0.6.1-3.module+el8.1.0+19504+b2d26fa1.ppc64le::mod_auth_openidc:2.3, cjose-0.6.1-3.module+el8.1.0+19504+b2d26fa1.src::mod_auth_openidc:2.3, cjose-0.6.1-3.module+el8.1.0+19504+b2d26fa1.x86_64::mod_auth_openidc:2.3 +5
  • RHSA-2023:4418 Released 2023-08-01 · Red Hat rating Important
    mod_auth_openidc:2.3 security update
    • Red Hat Enterprise Linux AppStream (v. 8) cjose-0.6.1-3.module+el8.8.0+19464+578f4546.aarch64::mod_auth_openidc:2.3, cjose-0.6.1-3.module+el8.8.0+19464+578f4546.ppc64le::mod_auth_openidc:2.3, cjose-0.6.1-3.module+el8.8.0+19464+578f4546.s390x::mod_auth_openidc:2.3 +11
  • RHSA-2023:4417 Released 2023-08-01 · Red Hat rating Important
    cjose security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) cjose-0.6.1-13.el9_0
Show 4 more Red Hat advisories
  • RHSA-2023:4411 Released 2023-08-01 · Red Hat rating Important
    cjose security update
    • Red Hat Enterprise Linux AppStream (v. 9) cjose-0.6.1-13.el9_2
  • RHSA-2023:4409 Released 2023-08-01 · Red Hat rating Important
    mod_auth_openidc:2.3 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) cjose-0.6.1-3.module+el8.4.0+19462+14bde120.src::mod_auth_openidc:2.3, cjose-0.6.1-3.module+el8.4.0+19462+14bde120.x86_64::mod_auth_openidc:2.3, cjose-devel-0.6.1-3.module+el8.4.0+19462+14bde120.x86_64::mod_auth_openidc:2.3 +2
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) cjose-0.6.1-3.module+el8.4.0+19462+14bde120.aarch64::mod_auth_openidc:2.3, cjose-0.6.1-3.module+el8.4.0+19462+14bde120.ppc64le::mod_auth_openidc:2.3, cjose-0.6.1-3.module+el8.4.0+19462+14bde120.s390x::mod_auth_openidc:2.3 +11
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) cjose-0.6.1-3.module+el8.4.0+19462+14bde120.src::mod_auth_openidc:2.3, cjose-0.6.1-3.module+el8.4.0+19462+14bde120.x86_64::mod_auth_openidc:2.3, cjose-devel-0.6.1-3.module+el8.4.0+19462+14bde120.x86_64::mod_auth_openidc:2.3 +2
  • RHSA-2023:4410 Released 2023-08-01 · Red Hat rating Important
    mod_auth_openidc:2.3 security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) cjose-0.6.1-3.module+el8.2.0+19461+3a40b6ee.src::mod_auth_openidc:2.3, cjose-0.6.1-3.module+el8.2.0+19461+3a40b6ee.x86_64::mod_auth_openidc:2.3, cjose-devel-0.6.1-3.module+el8.2.0+19461+3a40b6ee.x86_64::mod_auth_openidc:2.3 +2
    • Red Hat Enterprise Linux AppStream E4S (v. 8.2) cjose-0.6.1-3.module+el8.2.0+19461+3a40b6ee.ppc64le::mod_auth_openidc:2.3, cjose-0.6.1-3.module+el8.2.0+19461+3a40b6ee.src::mod_auth_openidc:2.3, cjose-0.6.1-3.module+el8.2.0+19461+3a40b6ee.x86_64::mod_auth_openidc:2.3 +5
    • Red Hat Enterprise Linux AppStream TUS (v. 8.2) cjose-0.6.1-3.module+el8.2.0+19461+3a40b6ee.src::mod_auth_openidc:2.3, cjose-0.6.1-3.module+el8.2.0+19461+3a40b6ee.x86_64::mod_auth_openidc:2.3, cjose-devel-0.6.1-3.module+el8.2.0+19461+3a40b6ee.x86_64::mod_auth_openidc:2.3 +2
  • RHSA-2023:4408 Released 2023-08-01 · Red Hat rating Important
    mod_auth_openidc:2.3 security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) cjose-0.6.1-3.module+el8.6.0+19463+7d2e1f9c.aarch64::mod_auth_openidc:2.3, cjose-0.6.1-3.module+el8.6.0+19463+7d2e1f9c.ppc64le::mod_auth_openidc:2.3, cjose-0.6.1-3.module+el8.6.0+19463+7d2e1f9c.s390x::mod_auth_openidc:2.3 +11

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:4418
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:4411
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2023:4410
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2023:4409
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2023:4429
Red Hat Enterprise Linux AppStream E4S (v. 8.2)Fixed RHSA-2023:4410
Red Hat Enterprise Linux AppStream E4S (v.8.4)Fixed RHSA-2023:4409
Red Hat Enterprise Linux AppStream EUS (v.8.6)Fixed RHSA-2023:4408
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2023:4417
Red Hat Enterprise Linux AppStream TUS (v. 8.2)Fixed RHSA-2023:4410
Red Hat Enterprise Linux AppStream TUS (v.8.4)Fixed RHSA-2023:4409

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-37464

References

Exploit 1

Patch 1

Advisory 1

Other 6

  • TI-2026-38908 OpenIDC/cjose uses all-zero Content Encryption Key for AES-CBC-HMAC JWE encryption CVSS 3.1CRITICAL 9.1
  • TI-2024-16331 Denial of service when manipulating mod_auth_openidc_session_chunks cookie in mod_auth_openidc CVSS 3.1HIGH 7.5
  • TI-2017-04220 The "OpenID Connect Relying Party and OAuth 2.0 Resource Server" (aka mod_auth_openidc)… CVSS 3.0HIGH 8.6
  • TI-2017-03971 The "OpenID Connect Relying Party and OAuth 2.0 Resource Server" (aka mod_auth_openidc)… CVSS 3.0HIGH 8.6
  • TI-2025-22673 mod_auth_openidc allows OIDCProviderAuthRequestMethod POSTs to leak protected data CVSS 4.0HIGH 8.2
  • TI-2023-13144 mod_auth_openidc core dump when OIDCStripCookies is set and an empty Cookie header is supplied CVSS 3.1HIGH 7.5
See all 22 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences