Bug 2256520

Summary:	TRIAGE CVE-2024-0202 cryptlib: RSA key exchange ciphersuites in TLS vulnerabilt to Marvin attack [epel-all]
Product:	[Fedora] Fedora EPEL	Reporter:	Robb Gatica <rgatica>
Component:	cryptlib	Assignee:	Ralf Senderek <innovation>
Status:	CLOSED NOTABUG	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	epel8	CC:	innovation
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2024-01-04 14:16:08 UTC	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:
Bug Blocks:	2256518

Description Robb Gatica 2024-01-02 21:01:31 UTC

More information about this security flaw is available in the following bug:

http://bugzilla.redhat.com/show_bug.cgi?id=2256518

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Comment 1 Robb Gatica 2024-01-02 21:01:33 UTC

Use the following template to for the 'fedpkg update' request to submit an
update for this issue as it contains the top-level parent bug(s) as well as
this tracking bug.  This will ensure that all associated bugs get updated
when new packages are pushed to stable.

=====

# bugfix, security, enhancement, newpackage (required)
type=security

# low, medium, high, urgent (required)
severity=medium

# testing, stable
request=testing

# Bug numbers: 1234,9876
bugs=2256518,2256520

# Description of your update
notes=Security fix for [PUT CVEs HERE]

# Enable request automation based on the stable/unstable karma thresholds
autokarma=True
stable_karma=3
unstable_karma=-3

# Automatically close bugs when this marked as stable
close_bugs=True

# Suggest that users restart after update
suggest_reboot=False

======

Additionally, you may opt to use the bodhi web interface to submit updates:

https://bodhi.fedoraproject.org/updates/new

Comment 2 Ralf Senderek 2024-01-04 14:16:08 UTC

In all packages, provided by me, cryptlib is NOT compiled
with the support for RSA key exchange ciphersuites in TLS.
Consequently it is NOT vulnerable to the timing variant of the
Bleichenbacher attack.

This vulnerability requires modifying the cryptlib source code to disable
timing-attack-protection measures and to enable the use of a disabled
crypto mechanism which is otherwise physically absent from the compiled code.
Unless the user goes out of their way to modify the cryptlib source code
to make it vulnerable, cryptlib is not vulnerable to this attack.