Apple Mac OS X up to 10.5.0 OpenSSL::OCSP input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Apple Mac OS X up to 10.5.0. This vulnerability affects the function OpenSSL::OCSP. Executing a manipulation can lead to input validation. This vulnerability is tracked as CVE-2009-0161. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Apple Mac OS X up to 10.5.0 (Operating System) and classified as critical. This vulnerability affects the function OpenSSL::OCSP. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity, and availability. CVE summarizes:

The OpenSSL::OCSP module for Ruby in Apple Mac OS X 10.5 before 10.5.7 misinterprets an unspecified invalid response as a successful OCSP certificate validation, which might allow remote attackers to spoof certificate authentication via a revoked certificate.

The bug was discovered 05/12/2009. The weakness was disclosed 05/13/2009 by Sebastian Apelt (Website). The advisory is shared for download at us-cert.gov. This vulnerability was named CVE-2009-0161 since 01/16/2009. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 38744 (Mac OS X 10.5.x < 10.5.7 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 116423 (Apple Mac OS X 10.5.7 and Security Update 2009-002 Not Installed (APPLE-SA-2009-05-12)).

Upgrading to version 10.5.1 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 (50592), Tenable (38744), SecurityFocus (BID 34926†), OSVDB (54439†) and Secunia (SA35074†). The entries VDB-3978, VDB-23858, VDB-30376 and VDB-40710 are pretty similar. Once again VulDB remains the best source for vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.5
VulDB Temp Score: 5.9
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: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 38744
Nessus Name: Mac OS X 10.5.x < 10.5.7 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 102035
OpenVAS Name: get_kb_item(ssh/login/osx_name
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mac OS X 10.5.1

Timelineinfo

01/16/2009 🔍
05/12/2009 +116 days 🔍
05/12/2009 +0 days 🔍
05/12/2009 +0 days 🔍
05/12/2009 +0 days 🔍
05/13/2009 +1 days 🔍
05/13/2009 +0 days 🔍
05/13/2009 +0 days 🔍
05/13/2009 +0 days 🔍
05/21/2009 +8 days 🔍
03/17/2015 +2126 days 🔍
05/27/2025 +3723 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: us-cert.gov
Researcher: Sebastian Apelt
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-0161 (🔍)
GCVE (CVE): GCVE-0-2009-0161
GCVE (VulDB): GCVE-100-48172
X-Force: 50592
SecurityFocus: 34926 - RETIRED: Apple Mac OS X 2009-002 Multiple Security Vulnerabilities
Secunia: 35074
OSVDB: 54439 - CVE-2009-0161 - Apple - Mac OS X - Spoofing Issue
Vulnerability Center: 22099 - Apple Mac OS X 10.5-10.5.6 OpenSSL::OCSP module for Ruby Remote Spoofing Vulnerability, Medium
Vupen: ADV-2009-1297

scip Labs: https://www.scip.ch/en/?labs.20150108
See also: 🔍

Entryinfo

Created: 03/17/2015 23:38
Updated: 05/27/2025 01:55
Changes: 03/17/2015 23:38 (77), 09/04/2019 12:51 (4), 05/27/2025 01:55 (20)
Complete: 🔍
Cache ID: 216::103

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