Apple Mac OS X up to 10.8.3 Setuid stack_protector.c RANDOM_HEX_STR stack-guard input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

A vulnerability was found in Apple Mac OS X up to 10.8.3 (Operating System). It has been classified as critical. This affects the function RANDOM_HEX_STR of the file sys/openbsd/stack_protector.c of the component Setuid. The manipulation of the argument stack-guard with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, and integrity. The summary by CVE is:

sys/openbsd/stack_protector.c in libc in Apple iOS 6.1.3 and Mac OS X 10.8.x does not properly parse the Apple strings employed in the user-space stack-cookie implementation, which allows local users to bypass cookie randomization by executing a program with a call-path beginning with the stack-guard= substring, as demonstrated by an iOS untethering attack or an attack against a setuid Mac OS X program.

The weakness was published 04/26/2013 by Stefan Esser with SektionEins GmbH as not defined article (Website). It is possible to read the advisory at antid0te.com. The vendor was not involved in the public release. This vulnerability is uniquely identified as CVE-2013-3951 since 06/05/2013. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/14/2021).

The vulnerability scanner Nessus provides a plugin with the ID 86270 (Mac OS X < 10.11 Multiple Vulnerabilities (GHOST)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks.

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 X-Force (84809) and Tenable (86270). Similar entries are available at 9013, 9014, 9016 and 9017.

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  • end of life

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

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

VulDB Base Score: 6.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
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CVSSv2info

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Exploitinginfo

Class: Input validation
CWE: CWE-20
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 86270
Nessus Name: Mac OS X < 10.11 Multiple Vulnerabilities (GHOST)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 801105
OpenVAS Name: Apple Mac OS X Multiple Vulnerabilities - 01 Jan14
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/26/2013 🔍
04/26/2013 +0 days 🔍
04/26/2013 +0 days 🔍
06/05/2013 +40 days 🔍
06/05/2013 +0 days 🔍
06/07/2013 +2 days 🔍
12/17/2014 +558 days 🔍
05/14/2021 +2340 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: antid0te.com
Researcher: Stefan Esser
Organization: SektionEins GmbH
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-3951 (🔍)
X-Force: 84809
SecurityTracker: 1033703
Vulnerability Center: 47680 - Apple iOS 6.1.3 and Mac OS X 10.8.x Local Security Bypass Vulnerability, Medium
SecurityFocus: 60440 - Apple iOS User Space Stack Cookies CVE-2013-3951 Local Security Bypass Vulnerability
OSVDB: 93960

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

Entryinfo

Created: 06/07/2013 17:59
Updated: 05/14/2021 12:42
Changes: 06/07/2013 17:59 (65), 06/15/2017 11:42 (11), 05/14/2021 12:34 (3), 05/14/2021 12:42 (1)
Complete: 🔍

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