Apple Mac OS X up to 10.11.2 libxslt type confusion

CVSS Meta Temp Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Apple Mac OS X up to 10.11.2. It has been classified as critical. This issue affects some unknown processing of the component libxslt. Performing a manipulation results in type confusion. This vulnerability is reported as CVE-2015-7995. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Apple Mac OS X up to 10.11.2 (Operating System). This affects an unknown code block of the component libxslt. The manipulation with an unknown input leads to a type confusion vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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 disclosed 01/19/2016 by Stefan Cornelius (puzzor) with Red Hat as HT205731 as confirmed advisory (Website). The advisory is shared at support.apple.com. This vulnerability is uniquely identified as CVE-2015-7995 since 10/28/2015. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. 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 87001 (FreeBSD : libxslt -- DoS vulnerability due to type confusing error (ecc268f2-8fc2-11e5-918c-bcaec565249c)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. 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 10.11.3 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 Tenable (87001) and SecurityFocus (BID 77325†). The entries VDB-79234, VDB-80331, VDB-80332 and VDB-80333 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Type confusion
CWE: CWE-843
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: 87001
Nessus Name: FreeBSD : libxslt -- DoS vulnerability due to type confusing error (ecc268f2-8fc2-11e5-918c-bcaec565249c)
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

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍

Upgrade: Mac OS X 10.11.3
Patch: git.gnome.org

Timelineinfo

10/27/2015 🔍
10/28/2015 +1 days 🔍
11/17/2015 +20 days 🔍
11/23/2015 +6 days 🔍
01/19/2016 +57 days 🔍
01/19/2016 +0 days 🔍
01/21/2016 +2 days 🔍
07/03/2022 +2355 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT205731
Researcher: Stefan Cornelius (puzzor)
Organization: Red Hat
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-7995 (🔍)
GCVE (CVE): GCVE-0-2015-7995
GCVE (VulDB): GCVE-100-80337

OVAL: 🔍

SecurityFocus: 77325 - libxslt 'libxslt/preproc.c' Type Confusion Remote Denial of Service Vulnerability
SecurityTracker: 1034736

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

Entryinfo

Created: 01/21/2016 09:24
Updated: 07/03/2022 17:54
Changes: 01/21/2016 09:24 (54), 06/25/2018 09:15 (24), 07/03/2022 17:54 (4)
Complete: 🔍
Cache ID: 216:3F9:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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