Bug 2184888 (CVE-2022-35409)

Summary:	CVE-2022-35409 mbedtls: unauthenticated attacker can send invalid ClientHello leads to heap-based buffer over-read
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	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
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Clone Of:		Environment:
Last Closed:	2023-04-06 11:35:26 UTC	Type:	---
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2184889, 2184890
Bug Blocks:

Description Dhananjay Arunesh 2023-04-06 06:37:00 UTC

An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.2.0. In some
configurations, an unauthenticated attacker can send an invalid ClientHello
message to a DTLS server that causes a heap-based buffer over-read of up to 255
bytes. This can cause a server crash or possibly information disclosure based on
error responses. Affected configurations have MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE
enabled and MBEDTLS_SSL_IN_CONTENT_LEN less than a threshold that depends on the
configuration: 258 bytes if using mbedtls_ssl_cookie_check, and possibly up to
571 bytes with a custom cookie check function.

References:
https://github.com/Mbed-TLS/mbedtls/releases
https://mbed-tls.readthedocs.io/en/latest/security-advisories/advisories/mbedtls-security-advisory-2022-07.html

Comment 1 Dhananjay Arunesh 2023-04-06 06:38:42 UTC

Created mbedtls tracking bugs for this issue:

Affects: epel-all [bug 2184890]
Affects: fedora-all [bug 2184889]

Comment 2 Product Security DevOps Team 2023-04-06 11:35:24 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.