Bug 2033018 (CVE-2021-44847)

Summary:	CVE-2021-44847 toxcore: stack-based buffer overflow in handle_request() in DHT.c
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:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	eclipseo
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:	2021-12-15 18:26:03 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:	2033019
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2021-12-15 17:44:11 UTC

A stack-based buffer overflow in handle_request function in DHT.c in toxcore 0.1.9 through 0.1.11 and 0.2.0 through 0.2.12 (caused by an improper length calculation during the handling of received network packets) allows remote attackers to crash the process or potentially execute arbitrary code via a network packet.

Reference:
https://blog.tox.chat/2021/12/stack-based-buffer-overflow-vulnerability-in-udp-packet-handling-in-toxcore-cve-2021-44847/

Upstream patch:
https://github.com/TokTok/c-toxcore/pull/1718

Comment 1 Guilherme de Almeida Suckevicz 2021-12-15 17:44:23 UTC

Created toxcore tracking bugs for this issue:

Affects: fedora-all [bug 2033019]

Comment 2 Product Security DevOps Team 2021-12-15 18:26:01 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.