Apple iOS up to 9.2.0 libxslt type confusion

CVSS Meta Temp Score
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CTI Interest Score
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8.4$5k-$25k0.00

A vulnerability classified as critical was found in Apple iOS up to 9.2.0 (Smartphone Operating System). This vulnerability affects an unknown code block of the component libxslt. The manipulation with an unknown input leads to a type confusion vulnerability. The CWE definition for the vulnerability is CWE-843. The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The xsltStylePreCompute function in preproc.c in libxslt 1.1.28 does not check if the parent node is an element, which allows attackers to cause a denial of service via a crafted XML file, related to a "type confusion" issue.

The weakness was shared 01/19/2016 by Liang Chen (puzzor) with Zero Day Initiative as HT205732 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability was named CVE-2015-7995 since 10/28/2015. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 07/03/2022). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

A type confusion issue existed in libxslt. This issue was addressed through improved memory handling.

The vulnerability scanner Nessus provides a plugin with the ID 88418 (Apple TV < 9.1.1 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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 124584 (Apple Mac OS X v10.11.3 and Security Update 2016-001 Not Installed (APPLE-SA-2016-01-19-2)).

Upgrading to version 9.2.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (88418). The entries 79234, 80331, 80332 and 80333 are related to this item.

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
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CVSSv2info

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Exploitinginfo

Class: Type confusion
CWE: CWE-843
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Current Price Estimation: 🔍

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Nessus ID: 88418
Nessus Name: Apple TV < 9.1.1 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 801105
OpenVAS Name: Apple Mac OS X Multiple Vulnerabilities-01 February-2016
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Upgrade: iOS 9.2.1
Patch: git.gnome.org

Timelineinfo

10/28/2015 🔍
11/17/2015 +20 days 🔍
01/19/2016 +63 days 🔍
01/19/2016 +0 days 🔍
01/19/2016 +0 days 🔍
01/21/2016 +2 days 🔍
01/27/2016 +6 days 🔍
03/21/2016 +54 days 🔍
03/22/2016 +1 days 🔍
07/03/2022 +2294 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT205732
Researcher: Liang Chen (puzzor)
Organization: Zero Day Initiative
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-7995 (🔍)
OVAL: 🔍

SecurityTracker: 1034736
Vulnerability Center: 57518 - Apple Mac OS X 10.9-10.9.5, 10.10-10.10.5 and 10.11-10.11.2 Remote Code Execution in libxslt, Medium
SecurityFocus: 81274 - Apple Mac OS X APPLE-SA-2016-01-19-2 Multiple Security Vulnerabilities

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

Entryinfo

Created: 01/21/2016 09:37
Updated: 07/03/2022 18:47
Changes: 01/21/2016 09:37 (65), 02/02/2019 10:56 (20), 07/03/2022 18:47 (4)
Complete: 🔍

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