Bug 2099227 (CVE-2022-33903)

Summary:	CVE-2022-33903 tor: degraded congestion control through wedged RTT estimation
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	casper, lewk, mh, pablo, paul.wouters, rh-bugzilla, s
Target Milestone:	---	Keywords:	Security
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:	2022-06-20 15:06:32 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:	2099228, 2099229
Bug Blocks:

Description Michael Kaplan 2022-06-20 11:11:17 UTC

A Denial of Service issue was fixed in tor 0.4.7.8 related to congestion control. RTT estimation can become wedged, seriously degrading congestion control performance on all circuits. This impacts clients, onion services, and relays, and can be triggered remotely by a malicious endpoint. 

References:
https://gitlab.torproject.org/tpo/core/tor/-/issues/40626
https://lists.torproject.org/pipermail/tor-announce/2022-June/000242.html
https://github.com/torproject/tor/commit/5a25374209689466e10906a77e66ad717a615a02
https://github.com/torproject/tor/commit/b0496d40197dd5b4fb7b694c1410082d4e34dda6

Comment 1 Michael Kaplan 2022-06-20 11:11:34 UTC

Created tor tracking bugs for this issue:

Affects: epel-all [bug 2099228]
Affects: fedora-all [bug 2099229]

Comment 2 Product Security DevOps Team 2022-06-20 15:06:31 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.