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Vulnerability Details : CVE-2013-2061

The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on the CBC mode cipher.
Publish Date : 2013-11-17 Last Update Date : 2014-01-03
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity High (Specialized access conditions exist. It is hard to exploit and several special conditions must be satisfied to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Obtain Information
CWE ID 200

- Related OVAL Definitions

Title Definition Id Class Family
SUSE-SU-2013:1783-1 -- Security update for openvpn oval:org.mitre.oval:def:25725 unix
USN-2368-1 -- openvpn vulnerability oval:org.mitre.oval:def:26572 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2013-2061

# Product Type Vendor Product Version Update Edition Language
1 OS Novell Opensuse 11.4 Version Details Vulnerabilities
2 Application Openvpn Openvpn 1.2.0 Version Details Vulnerabilities
3 Application Openvpn Openvpn 1.2.1 Version Details Vulnerabilities
4 Application Openvpn Openvpn 1.3.0 Version Details Vulnerabilities
5 Application Openvpn Openvpn 1.3.1 Version Details Vulnerabilities
6 Application Openvpn Openvpn 1.3.2 Version Details Vulnerabilities
7 Application Openvpn Openvpn 1.4.0 Version Details Vulnerabilities
8 Application Openvpn Openvpn 1.4.1 Version Details Vulnerabilities
9 Application Openvpn Openvpn 1.4.2 Version Details Vulnerabilities
10 Application Openvpn Openvpn 1.4.3 Version Details Vulnerabilities
11 Application Openvpn Openvpn 1.5.0 Version Details Vulnerabilities
12 Application Openvpn Openvpn 1.6.0 Version Details Vulnerabilities
13 Application Openvpn Openvpn 2.0.0 Version Details Vulnerabilities
14 Application Openvpn Openvpn 2.1.0 Version Details Vulnerabilities
15 Application Openvpn Openvpn 2.2.0 Version Details Vulnerabilities
16 Application Openvpn Openvpn 2.3.0 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Novell Opensuse 1
Openvpn Openvpn 15

- References For CVE-2013-2061
MLIST [oss-security] 20130506 Re: CVE request: OpenVPN use of non-constant-time memcmp in HMAC comparison in openvpn_decrypt
SUSE openSUSE-SU-2013:1649
SUSE openSUSE-SU-2013:1645

- Metasploit Modules Related To CVE-2013-2061

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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