Bug 2272879 (CVE-2024-28755)

Summary:	CVE-2024-28755 Mbed-TLS: Denial of Service
Product:	[Other] Security Response	Reporter:	Avinash Hanwate <ahanwate>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		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:	2272880, 2272881
Bug Blocks:

Description Avinash Hanwate 2024-04-03 04:56:36 UTC

An issue was discovered in Mbed TLS 3.5.x before 3.6.0. When an SSL context was reset with the mbedtls_ssl_session_reset() API, the maximum TLS version to be negotiated was not restored to the configured one. An attacker was able to prevent an Mbed TLS server from establishing any TLS 1.3 connection, potentially resulting in a Denial of Service or forced version downgrade from TLS 1.3 to TLS 1.2.

https://github.com/Mbed-TLS/mbedtls/releases/tag/v3.6.0
https://github.com/hey3e
https://hey3e.github.io
https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/

Comment 1 Avinash Hanwate 2024-04-03 04:56:53 UTC

Created mbedtls tracking bugs for this issue:

Affects: epel-all [bug 2272881]
Affects: fedora-all [bug 2272880]