CVE-2023-37464
Published: 14 July 2023
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).
Priority
Status
Package | Release | Status |
---|---|---|
cjose Launchpad, Ubuntu, Debian |
trusty |
Ignored
(end of standard support)
|
xenial |
Ignored
(end of standard support)
|
|
bionic |
Released
(0.6.0+dfsg1-1ubuntu0.1~esm1)
Available with Ubuntu Pro |
|
lunar |
Released
(0.6.2.1-1ubuntu0.1)
|
|
upstream |
Needs triage
|
|
kinetic |
Ignored
(end of life, was needed)
|
|
focal |
Released
(0.6.1+dfsg1-1ubuntu0.1)
|
|
jammy |
Released
(0.6.1+dfsg1-3ubuntu1.1)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | High |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-37464
- https://github.com/OpenIDC/cjose/security/advisories/GHSA-3rhg-3gf2-6xgj
- https://github.com/OpenIDC/cjose/commit/7325e9a5e71e2fc0e350487ecac7d84acdf0ed5e (v0.6.2.2)
- 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
- NVD
- Launchpad
- Debian