NetBSD up to 2.0.2 FreeBSD Compatibility Mode memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

A vulnerability has been found in NetBSD up to 2.0.2 (Operating System) and classified as problematic. This vulnerability affects an unknown part of the component FreeBSD Compatibility Mode. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The SSL/TLS server implementation in OpenSSL 0.9.7 before 0.9.7h and 0.9.8 before 0.9.8a, when using the SSL_OP_MSIE_SSLV2_RSA_PADDING option, disables a verification step that is required for preventing protocol version rollback attacks, which allows remote attackers to force a client and server to use a weaker protocol than needed via a man-in-the-middle attack.

The bug was discovered 10/11/2005. The weakness was presented 11/02/2005 by Christer Oeberg (Website). The advisory is available at ftp.netbsd.org. This vulnerability was named CVE-2005-2969 since 09/19/2005. The attack needs to be done within the local network. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed in ANSI C and been published even before and not after the advisory. It is possible to download the exploit at packetstormsecurity.nl. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 20031 (GLSA-200510-11 : OpenSSL: SSL 2.0 protocol rollback), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 185030 (HP-UX Running OpenSSL Multiple Vulnerabilities (HPSBUX02174)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at netbsd.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published even before and not after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 13614.

The vulnerability is also documented in the databases at X-Force (16193), Tenable (20031) and Exploit-DB (300). See 666, 1786, 1803 and 1846 for similar entries.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
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CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Partially

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

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Nessus ID: 20031
Nessus Name: GLSA-200510-11 : OpenSSL: SSL 2.0 protocol rollback
Nessus File: 🔍
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OpenVAS ID: 55751
OpenVAS Name: Debian Security Advisory DSA 875-1 (openssl094)
OpenVAS File: 🔍
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Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: netbsd.org

Snort ID: 13614

Timelineinfo

05/19/2004 🔍
05/21/2004 +2 days 🔍
09/19/2005 +485 days 🔍
10/11/2005 +22 days 🔍
10/11/2005 +0 days 🔍
10/18/2005 +7 days 🔍
10/19/2005 +1 days 🔍
10/27/2005 +8 days 🔍
11/02/2005 +6 days 🔍
11/07/2005 +5 days 🔍
11/30/2005 +23 days 🔍
07/05/2019 +4965 days 🔍

Sourcesinfo

Advisory: ftp.netbsd.org
Researcher: Christer Oeberg
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2005-2969 (🔍)
OVAL: 🔍

X-Force: 16193
SecurityTracker: 1015032
SecurityFocus: 15647 - RETIRED: Apple Mac OS X Security Update 2005-009 Multiple Vulnerabilities
Secunia: 17389 - NetBSD Update Fixes Multiple Vulnerabilities, Highly Critical
OSVDB: 6305 - CVS pserver Line Entry Handling Remote Overflow
Vupen: ADV-2005-2710

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 11/07/2005 10:26
Updated: 07/05/2019 09:29
Changes: 11/07/2005 10:26 (98), 07/05/2019 09:29 (1)
Complete: 🔍

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