CVE-2023-37464

Publication date 14 July 2023

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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).

Status

Show unmaintained releases

Package	Ubuntu Release	Status
cjose	24.10 oracular	Needs evaluation
	24.04 LTS noble	Needs evaluation
	23.10 mantic	Ignored end of life, was needs-triage
	23.04 lunar	Fixed 0.6.2.1-1ubuntu0.1
	22.10 kinetic	Ignored end of life, was needed
	22.04 LTS jammy	Fixed 0.6.1+dfsg1-3ubuntu1.1
	20.04 LTS focal	Fixed 0.6.1+dfsg1-1ubuntu0.1
	18.04 LTS bionic	Fixed 0.6.0+dfsg1-1ubuntu0.1~esm1 Ubuntu Pro
	16.04 LTS xenial	Ignored end of standard support
	14.04 LTS trusty	Ignored end of standard support

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Severity score breakdown

Parameter	Value
Base score	7.5 · High
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

Related Ubuntu Security Notices (USN)

USN-6307-1
JOSE for C/C++ vulnerability
24 August 2023