CVE-2023-37464

2023-07-1421:15:08

Alpine Linux Development Team

security.alpinelinux.org

openidc

cjes

aes gcm

decryption

vulnerability

authentication tag

jwe

upgrade

encryption

algorithm

secure

CVSS3

8.6

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

AI Score

7.4

Confidence

High

EPSS

0.003

Percentile

65.9%

JSON

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).

OSVersionArchitecturePackageVersionFilename
Alpineedge-communitynoarchcjose< 0.6.2.2-r0UNKNOWN
Alpine3.19-communitynoarchcjose< 0.6.2.2-r0UNKNOWN
Alpine3.20-communitynoarchcjose< 0.6.2.2-r0UNKNOWN

OS	Version	Architecture	Package	Version	Filename
Alpine	edge-community	noarch	cjose	< 0.6.2.2-r0	UNKNOWN
Alpine	3.19-community	noarch	cjose	< 0.6.2.2-r0	UNKNOWN
Alpine	3.20-community	noarch	cjose	< 0.6.2.2-r0	UNKNOWN