OpenVPN Heartbeat Information Disclosure (Heartbleed)
medium Nessus Plugin ID 73491
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Synopsis
The remote service is affected by an information disclosure vulnerability.Description
Based on its response to a TLS request with a specially crafted heartbeat message (RFC 6520), the remote OpenVPN service appears to be affected by an out-of-bounds read flaw.Because the remote OpenVPN service does not employ the 'HMAC Firewall' feature, this vulnerability can be exploited without authentication.
This vulnerability could allow an attacker to obtain secret keys, cleartext VPN traffic, and other sensitive data.
Solution
Upgrade the version of OpenSSL that OpenVPN is linked against to 1.0.1g or later. Alternatively, recompile OpenSSL with the '-DOPENSSL_NO_HEARTBEATS' flag to disable the vulnerable functionality. For Windows servers, upgrade to OpenVPN version 2.3.2-I004 or later.See Also
http://eprint.iacr.org/2014/140
https://www.openssl.org/news/vulnerabilities.html#2014-0160
Plugin Details
Severity: Medium
ID: 73491
File Name: openvpn_heartbleed.nasl
Version: 1.14
Type: remote
Family: Misc.
Published: 4/14/2014
Updated: 11/26/2019
Dependencies: openvpn_detect.nasl
Risk Information
CVSS Score Source: CVE-2014-0160
VPR
Risk Factor: High
Score: 7.3
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 4.1
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Temporal Vector: E:F/RL:OF/RC:C
Vulnerability Information
CPE: cpe:/a:openvpn:openvpn
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 4/7/2014
Vulnerability Publication Date: 2/24/2014
Exploitable With
Core Impact
Metasploit (OpenSSL Heartbeat (Heartbleed) Information Leak)
Reference Information
CVE: CVE-2014-0160
BID: 66690