OpenSSL 0.9.6 Certificates improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.3$5k-$25k0.00

Summaryinfo

A vulnerability classified as critical has been found in OpenSSL 0.9.6. This affects an unknown part of the component Certificates. This manipulation causes improper authentication. This vulnerability is registered as CVE-2009-0653. No exploit is available.

Detailsinfo

A vulnerability classified as critical was found in OpenSSL 0.9.6 (Network Encryption Software). Affected by this vulnerability is some unknown processing of the component Certificates. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

OpenSSL, probably 0.9.6, does not verify the Basic Constraints for an intermediate CA-signed certificate, which allows remote attackers to spoof the certificates of trusted sites via a man-in-the-middle attack, a related issue to CVE-2002-0970.

The issue has been introduced in 09/24/2000. The weakness was published 02/20/2009 (Website). It is possible to read the advisory at blackhat.com. This vulnerability is known as CVE-2009-0653 since 02/20/2009. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/04/2021).

The vulnerability was handled as a non-public zero-day exploit for at least 3071 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 17751 (OpenSSL 0.9.6 CA Basic Constraints Validation Vulnerability), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Web Servers.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (17751) and Vulnerability Center (SBV-34773†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

Support

  • end of life (old version)

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 17751
Nessus Name: OpenSSL 0.9.6 CA Basic Constraints Validation Vulnerability
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/24/2000 🔍
02/20/2009 +3071 days 🔍
02/20/2009 +0 days 🔍
02/20/2009 +0 days 🔍
02/20/2009 +0 days 🔍
01/04/2012 +1048 days 🔍
04/02/2012 +89 days 🔍
03/17/2015 +1079 days 🔍
08/04/2021 +2332 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: blackhat.com
Status: Not defined

CVE: CVE-2009-0653 (🔍)
GCVE (CVE): GCVE-0-2009-0653
GCVE (VulDB): GCVE-100-46675

OVAL: 🔍

Vulnerability Center: 34773 - OpenSSL 0.9.6 Error in Basic Constraints Verification Allows Remote Certificate Spoofing, High

Entryinfo

Created: 03/17/2015 16:11
Updated: 08/04/2021 16:24
Changes: 03/17/2015 16:11 (52), 04/10/2017 17:56 (8), 08/04/2021 16:24 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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