Bug 1940631 (CVE-2021-28089)

Summary:	CVE-2021-28089 tor: dump_desc function was called incorrectly in several places in a way that could lead to excessive CPU usage
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	lewk, mh, pwouters, 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:	2021-03-18 19:51:51 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:	1940632, 1940633
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2021-03-18 18:47:42 UTC

A flaw was found in Tor because the dump_desc() function that is used to dump unparseable information to disk was called incorrectly in several places, in a way that could lead to excessive CPU usage. This bug is also tracked as TROVE-2021-001.

References:
https://gitlab.torproject.org/tpo/core/tor/-/issues/40286
https://blog.torproject.org/node/2009

Comment 1 Guilherme de Almeida Suckevicz 2021-03-18 18:48:12 UTC

Created tor tracking bugs for this issue:

Affects: epel-all [bug 1940633]
Affects: fedora-all [bug 1940632]

Comment 2 Product Security DevOps Team 2021-03-18 19:51:51 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.