OpenSSL 0.9.8/1.0.0/1.0.1/1.0.2 SSLv2 Message CLIENT-MASTER-KEY Message input validation

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

A vulnerability was found in OpenSSL 0.9.8/1.0.0/1.0.1/1.0.2 (Network Encryption Software). It has been rated as problematic. This issue affects an unknown code block of the component SSLv2 Message Handler. The manipulation as part of a CLIENT-MASTER-KEY Message leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability.

The issue has been introduced in 07/05/2005. The weakness was released 03/19/2015 by Sean Burford with OpenSSL as secadv_20150319.txt as confirmed advisory (Website). It is possible to read the advisory at openssl.org. The identification of this vulnerability is CVE-2015-0293 since 11/18/2014. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 3544 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 82900 (AIX OpenSSL Advisory : openssl_advisory13.asc), which helps to determine the existence of the flaw in a target environment. It is assigned to the family AIX Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 185104 (HP-UX Running OpenSSL Remote Denial of Service Vulnerability (HPSBUX03334)).

Upgrading to version 0.9.8zf, 1.0.0r, 1.0.1m or 1.0.2a eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (101671) and Tenable (82900). grahamcluley.com is providing further details. Entries connected to this vulnerability are available at 74043, 74044, 74045 and 74046.

Productinfo

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Support

  • end of life (old version)

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: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

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Nessus ID: 82900
Nessus Name: AIX OpenSSL Advisory : openssl_advisory13.asc
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800731
OpenVAS Name: Fedora Update for openssl FEDORA-2015-4303
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Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: OpenSSL 0.9.8zf/1.0.0r/1.0.1m/1.0.2a
Patch: 86f8fb0e344d62454f8daf3e15236b2b59210756
ISS Proventia IPS: 🔍

Timelineinfo

07/05/2005 🔍
11/18/2014 +3423 days 🔍
03/16/2015 +118 days 🔍
03/18/2015 +2 days 🔍
03/19/2015 +0 days 🔍
03/19/2015 +0 days 🔍
03/19/2015 +0 days 🔍
03/20/2015 +1 days 🔍
04/20/2015 +30 days 🔍
07/20/2015 +91 days 🔍
03/01/2016 +226 days 🔍
04/15/2022 +2235 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: secadv_20150319.txt
Researcher: Sean Burford
Organization: OpenSSL
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-0293 (🔍)
OVAL: 🔍

X-Force: 101671 - OpenSSL SSLv2 CLIENT-MASTER-KEY denial of service
SecurityTracker: 1031929
Vulnerability Center: 56905 - OpenSSL Remote DoS via a Crafted CLIENT-MASTER-KEY Message - CVE-2015-0293, Medium
SecurityFocus: 73232 - OpenSSL CVE-2015-0293 Denial of Service Vulnerability

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Entryinfo

Created: 03/20/2015 09:52
Updated: 04/15/2022 21:37
Changes: 03/20/2015 09:52 (76), 08/25/2018 09:20 (15), 04/15/2022 21:37 (5)
Complete: 🔍

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