Bug 2250095 (CVE-2023-46849)

Summary:	CVE-2023-46849 openvpn: Use of --fragment option can lead to a division by zero error
Product:	[Other] Security Response	Reporter:	Mauro Matteo Cascella <mcascell>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	openvpn 2.12.2	Doc Type:	If docs needed, set a value
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2250096, 2250097
Bug Blocks:

Description Mauro Matteo Cascella 2023-11-16 16:15:15 UTC

Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.

References:
https://openvpn.net/security-advisory/access-server-security-update-cve-2023-46849-cve-2023-46850/
https://community.openvpn.net/openvpn/wiki/CVE-2023-46849

Comment 1 Mauro Matteo Cascella 2023-11-16 16:15:46 UTC

Created openvpn tracking bugs for this issue:

Affects: epel-all [bug 2250096]
Affects: fedora-all [bug 2250097]