OpenBSD 3.8/3.9 isakmpd IPsec Sequence Number Verification unknown vulnerability

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

A vulnerability, which was classified as critical, was found in OpenBSD 3.8/3.9 (Operating System). Affected is an unknown code of the component isakmpd IPsec Sequence Number Verification. This is going to have an impact on integrity. CVE summarizes:

isakmpd in OpenBSD 3.8, 3.9, and possibly earlier versions, creates Security Associations (SA) with a replay window of size 0 when isakmpd acts as a responder during SA negotiation, which allows remote attackers to replay IPSec packets and bypass the replay protection.

The bug was discovered 08/25/2006. The weakness was released 08/28/2006 with OpenBSD Team (Website). The advisory is shared for download at openbsd.org. This vulnerability is traded as CVE-2006-4436 since 08/28/2006. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 22717 (Debian DSA-1175-1 : isakmpd - programming error), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l.

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at ftp.openbsd.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (28645) and Tenable (22717). Entries connected to this vulnerability are available at 2495 and 2497.

Productinfo

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Unknown
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

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Nessus ID: 22717
Nessus Name: Debian DSA-1175-1 : isakmpd - programming error
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 57361
OpenVAS Name: Debian Security Advisory DSA 1175-1 (isakmpd)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Patch: ftp.openbsd.org

Timelineinfo

08/25/2006 🔍
08/25/2006 +0 days 🔍
08/25/2006 +0 days 🔍
08/25/2006 +0 days 🔍
08/28/2006 +3 days 🔍
08/28/2006 +0 days 🔍
08/28/2006 +0 days 🔍
08/28/2006 +0 days 🔍
08/29/2006 +0 days 🔍
09/13/2006 +15 days 🔍
09/14/2006 +1 days 🔍
10/14/2006 +30 days 🔍
06/26/2007 +255 days 🔍
07/20/2019 +4407 days 🔍

Sourcesinfo

Advisory: openbsd.org
Researcher: http://www.openbsd.org
Organization: OpenBSD Team
Status: Confirmed

CVE: CVE-2006-4436 (🔍)
X-Force: 28645 - OpenBSD isakmpd replay protection bypass, Low Risk
SecurityTracker: 1016757
Vulnerability Center: 15454 - OpenBSD Ipsec Vulnerability Allows Replay Attack, Medium
SecurityFocus: 19712 - OpenBSD ISAKMPD IPsec Replay Vulnerability
Secunia: 21905
OSVDB: 28194 - OpenBSD isakmpd IPSec Packet Replay

See also: 🔍

Entryinfo

Created: 08/29/2006 16:56
Updated: 07/20/2019 21:45
Changes: 08/29/2006 16:56 (96), 07/20/2019 21:45 (1)
Complete: 🔍

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