Apple Mac OS X up to 10.8 dyld openSharedCacheFile memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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9.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Apple Mac OS X up to 10.8. The affected element is the function openSharedCacheFile of the component dyld. The manipulation leads to memory corruption. This vulnerability is uniquely identified as CVE-2013-3950. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple Mac OS X up to 10.8 (Operating System). It has been rated as very critical. This issue affects the function openSharedCacheFile of the component dyld. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Stack-based buffer overflow in the openSharedCacheFile function in dyld.cpp in dyld in Apple iOS 5.1.x and 6.x through 6.1.3 makes it easier for attackers to conduct untethering attacks via a long string in the DYLD_SHARED_CACHE_DIR environment variable.

The weakness was disclosed 10/22/2013 by Stefan Esser as APPLE-SA-2013-10-22-3 as confirmed mailinglist post (Apple Security Mailinglist). It is possible to read the advisory at lists.apple.com. The identification of this vulnerability is CVE-2013-3950 since 06/05/2013. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful 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 05/31/2021).

The vulnerability scanner Nessus provides a plugin with the ID 70257 (Apple TV < 6.0 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc..

Upgrading to version 10.9 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 (84808), Tenable (70257), SecurityFocus (BID 60437†) and Vulnerability Center (SBV-48907†). The entries VDB-8559, VDB-8792, VDB-8797 and VDB-8796 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.5

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 70257
Nessus Name: Apple TV < 6.0 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍

Upgrade: Mac OS X 10.9

Timelineinfo

04/26/2013 🔍
04/26/2013 +0 days 🔍
06/05/2013 +40 days 🔍
06/05/2013 +0 days 🔍
10/22/2013 +139 days 🔍
10/22/2013 +0 days 🔍
10/23/2013 +1 days 🔍
03/09/2015 +502 days 🔍
05/31/2021 +2275 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: APPLE-SA-2013-10-22-3
Researcher: Stefan Esser
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-3950 (🔍)
GCVE (CVE): GCVE-0-2013-3950
GCVE (VulDB): GCVE-100-10907
X-Force: 84808
SecurityFocus: 60437 - Apple iOS CVE-2013-3950 Stack Based Buffer Overflow Vulnerability
SecurityTracker: 1029054
Vulnerability Center: 48907 - Apple iOS 5.1 and 6-6.13 Remote Untethering Attack due to Buffer Overflow in dyld openSharedCacheFile(), Medium

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

Entryinfo

Created: 10/23/2013 17:41
Updated: 05/31/2021 15:48
Changes: 10/23/2013 17:41 (71), 06/22/2017 10:29 (2), 05/31/2021 15:41 (2), 05/31/2021 15:48 (1)
Complete: 🔍
Cache ID: 216:DA1:103

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