Bug 1834406 (CVE-2020-11462) - CVE-2020-11462 openvpn: temporary DoS state of the management interface when sending an XML Entity Expansion payload to the XMLRPC based RPC2
Summary: CVE-2020-11462 openvpn: temporary DoS state of the management interface when ...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-11462
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1834407 1834408
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-05-11 16:32 UTC by Guilherme de Almeida Suckevicz
Modified: 2020-05-11 17:39 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2020-05-11 17:39:25 UTC
Embargoed:

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Description Guilherme de Almeida Suckevicz 2020-05-11 16:32:31 UTC 
An issue was discovered in OpenVPN Access Server before 2.7.0 and 2.8.x before 2.8.3. With the full featured RPC2 interface enabled, it is possible to achieve a temporary DoS state of the management interface when sending an XML Entity Expansion (XEE) payload to the XMLRPC based RPC2 interface. The duration of the DoS state depends on available memory and CPU speed. The default restricted mode of the RPC2 interface is NOT vulnerable.

Reference:
https://openvpn.net/vpn-server-resources/release-notes/#Release_notes_for_OpenVPN_Access_Server_283
Comment 1 Guilherme de Almeida Suckevicz 2020-05-11 16:32:51 UTC 
Created openvpn tracking bugs for this issue:

Affects: epel-all [bug 1834408]
Affects: fedora-all [bug 1834407]
Comment 2 David Sommerseth 2020-05-11 17:39:25 UTC 
See bugzilla #1834406
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