OpenVPN up to 2.0.0 denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in OpenVPN up to 2.0.0. It has been declared as problematic. This affects an unknown function. Such manipulation leads to denial of service. This vulnerability is traded as CVE-2005-2532. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in OpenVPN up to 2.0.0 (Network Encryption Software). It has been rated as problematic. Affected by this issue is some unknown processing. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

OpenVPN before 2.0.1 does not properly flush the OpenSSL error queue when a packet can not be decrypted by the server, which allows remote authenticated attackers to cause a denial of service (client disconnection) via a large number of packets that can not be decrypted.

The bug was discovered 08/19/2005. The weakness was shared 08/24/2005 (Website). The advisory is shared for download at mandriva.com. This vulnerability is handled as CVE-2005-2532 since 08/10/2005. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 21513 (FreeBSD : openvpn -- denial of service: undecryptable packet from authorized client can disconnect unrelated clients (d1c39c8e-05ab-4739-870f-765490fa2052)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38463 (OpenVPN Packet Decryption Failure Denial of Service Vulnerability).

Upgrading to version 2.0.1 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (21925), Tenable (21513), SecurityFocus (BID 14607†), OSVDB (18883†) and Secunia (SA16463†). The entries VDB-26772, VDB-26743, VDB-26146 and VDB-26145 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 21513
Nessus Name: FreeBSD : openvpn -- denial of service: undecryptable packet from authorized client can disconnect unrelated clients (d1c39c8e-05ab-4739-870f-765490fa2052)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 55602
OpenVAS Name: Debian Security Advisory DSA 851-1 (openvpn)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenVPN 2.0.1

Timelineinfo

08/10/2005 🔍
08/19/2005 +9 days 🔍
08/19/2005 +0 days 🔍
08/19/2005 +0 days 🔍
08/19/2005 +0 days 🔍
08/24/2005 +5 days 🔍
08/24/2005 +0 days 🔍
11/15/2005 +83 days 🔍
05/13/2006 +179 days 🔍
03/11/2015 +3224 days 🔍
06/11/2019 +1553 days 🔍

Sourcesinfo

Advisory: mandriva.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2005-2532 (🔍)
GCVE (CVE): GCVE-0-2005-2532
GCVE (VulDB): GCVE-100-26144
X-Force: 21925
SecurityFocus: 14607 - OpenVPN Packet Decryption Failure Denial Of Service Vulnerability
Secunia: 16463 - OpenVPN Multiple DoS Vulnerabilities, Moderately Critical
OSVDB: 18883 - OpenVPN - Packet Decryption Failure Denial Of Service Issue
Vulnerability Center: 9633 - OpenVPN Remote DoS via Large Number of Undecryptable Packets, Medium

See also: 🔍

Entryinfo

Created: 03/11/2015 23:39
Updated: 06/11/2019 12:35
Changes: 03/11/2015 23:39 (74), 06/11/2019 12:35 (7)
Complete: 🔍
Cache ID: 216::103

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