Bug 2223295 (CVE-2023-37464)

Summary:	CVE-2023-37464 cjose: AES GCM decryption uses the Tag length from the actual Authentication Tag provided in the JWE
Product:	[Other] Security Response	Reporter:	Vipul Nair <vinair>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	thalman
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	cjose 0.6.2.2	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in cjose. The 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 JSON Web Encryption (JWE). A fixed length of 16 octets must be applied. This flaw allows an attacker to provide a truncated Authentication Tag and modify the JWE.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2223307, 2223308, 2223330, 2223487, 2223488, 2223489, 2223490, 2223491, 2223492, 2223493
Bug Blocks:	2223315

Description Vipul Nair 2023-07-17 09:57:33 UTC

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).

https://github.com/OpenIDC/cjose/security/advisories/GHSA-3rhg-3gf2-6xgj
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

Comment 2 TEJ RATHI 2023-07-17 11:46:55 UTC

Created cjose tracking bugs for this issue:

Affects: fedora-all [bug 2223330]

Comment 5 errata-xmlrpc 2023-08-01 13:33:27 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2023:4408 https://access.redhat.com/errata/RHSA-2023:4408

Comment 6 errata-xmlrpc 2023-08-01 13:42:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support
  Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.2 Telecommunications Update Service

Via RHSA-2023:4410 https://access.redhat.com/errata/RHSA-2023:4410

Comment 7 errata-xmlrpc 2023-08-01 13:42:12 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.4 Telecommunications Update Service

Via RHSA-2023:4409 https://access.redhat.com/errata/RHSA-2023:4409

Comment 8 errata-xmlrpc 2023-08-01 13:49:57 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:4411 https://access.redhat.com/errata/RHSA-2023:4411

Comment 9 errata-xmlrpc 2023-08-01 14:14:49 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Extended Update Support

Via RHSA-2023:4417 https://access.redhat.com/errata/RHSA-2023:4417

Comment 10 errata-xmlrpc 2023-08-01 14:20:59 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:4418 https://access.redhat.com/errata/RHSA-2023:4418

Comment 11 errata-xmlrpc 2023-08-02 07:56:37 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions

Via RHSA-2023:4429 https://access.redhat.com/errata/RHSA-2023:4429