UBUNTU-CVE-2023-37464

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    UBUNTU-CVE-2023-37464

    Published: 14 Jul 2023Last Modified: 20 May 2026
    Upstream:
    CVE-2023-37464
    Aliases:
    USN-6307-1

    Summary:

    Details: 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).

    References: https://ubuntu.com/security/CVE-2023-37464, https://github.com/OpenIDC/cjose/security/advisories/GHSA-3rhg-3gf2-6xgj, https://github.com/OpenIDC/cjose/commit/7325e9a5e71e2fc0e350487ecac7d84acdf0ed5e, https://github.com/OpenIDC/cjose/commit/7325e9a5e71e2fc0e350487ecac7d84acdf0ed5e, https://datatracker.ietf.org/doc/html/rfc7518#section-4.7, https://github.com/OpenIDC/cjose/releases/tag/v0.6.2.2, https://ubuntu.com/security/notices/USN-6307-1, https://www.cve.org/CVERecord?id=CVE-2023-37464

    Affected packages

    Package

    Name: cjose

    Purl: pkg:deb/ubuntu/cjose?arch=source&distro=esm-apps%2Fbionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.6.0+dfsg1-1ubuntu0.1~esm1

    Affected versions

    0.4.1-3ubuntu1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2023-37464 | CVE-DB