VDB-10319 · CVE-2013-3950 · BID 52107

Apple iOS up to 6.1.4 dyld openSharedCacheFile memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.5$5k-$25k0.00

A vulnerability was found in Apple iOS up to 6.1.4 (Smartphone Operating System) and classified 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 shared 09/18/2013 by Stefan Esser as APPLE-SA-2013-09-18-2 iOS 7 as confirmed mailinglist post (Website). It is possible to read the advisory at prod.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 $5k-$25k at the moment (estimation calculated on 05/25/2021). It is expected to see the exploit prices for this product increasing in the near future.

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. and running in the context r.

Upgrading to version iOS 7.0 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 vulnerability database at Tenable (70257). zdnet.com is providing further details. The entries 4661, 8303, 8559 and 8792 are related to this item.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

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: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍
Upgrade: iOS iOS 7.0

Timelineinfo

02/21/2012 🔍
06/05/2013 +470 days 🔍
06/05/2013 +0 days 🔍
09/18/2013 +105 days 🔍
09/18/2013 +0 days 🔍
09/20/2013 +1 days 🔍
10/01/2013 +11 days 🔍
05/25/2021 +2793 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: APPLE-SA-2013-09-18-2 iOS 7
Researcher: Stefan Esser
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-3950 (🔍)
SecurityTracker: 1029054
SecurityFocus: 52107

scip Labs: https://www.scip.ch/en/?labs.20150917
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 09/20/2013 10:34
Updated: 05/25/2021 08:33
Changes: 09/20/2013 10:34 (67), 03/24/2019 13:49 (1), 05/25/2021 08:28 (2), 05/25/2021 08:33 (2)
Complete: 🔍

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