Apple macOS up to 10.11 libxml2 use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.00

A vulnerability was found in Apple macOS up to 10.11 (Operating System). It has been classified as critical. Affected is some unknown functionality of the component libxml2. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Use-after-free vulnerability in libxml2 through 2.9.4, as used in Google Chrome before 52.0.2743.82, allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to the XPointer range-to function.

The bug was discovered 07/20/2016. The weakness was shared 09/20/2016 by Nick Wellnhofer (Cloudfuzzer) with Tencent as HT207170 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability is traded as CVE-2016-5131 since 05/31/2016. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The advisory points out:

Multiple memory corruption issues were addressed through improved memory handling.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 92628 (Google Chrome < 52.0.2743.82 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370091 (Google Chrome Prior to 52.0.2743.82 Multiple Vulnerabilities).

Upgrading to version 10.12 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 (92628). The entries 90229, 90230, 90231 and 90232 are related to this item.

Productinfo

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Vendor

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

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

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / 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: 92628
Nessus Name: Google Chrome < 52.0.2743.82 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

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

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: macOS 10.12

Timelineinfo

05/31/2016 🔍
07/20/2016 +50 days 🔍
07/20/2016 +0 days 🔍
07/23/2016 +3 days 🔍
07/29/2016 +6 days 🔍
09/20/2016 +53 days 🔍
09/20/2016 +0 days 🔍
09/26/2016 +6 days 🔍
09/21/2022 +2186 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT207170
Researcher: Nick Wellnhofer (Cloudfuzzer)
Organization: Tencent
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-5131 (🔍)
OVAL: 🔍

SecurityTracker: 1036428
SecurityFocus: 92053 - Google Chrome Prior to 52.0.2743.82 Multiple Security Vulnerabilities

scip Labs: https://www.scip.ch/en/?labs.20180712
See also: 🔍

Entryinfo

Created: 09/26/2016 11:34
Updated: 09/21/2022 07:52
Changes: 09/26/2016 11:34 (69), 07/17/2019 15:51 (20), 09/21/2022 07:52 (3)
Complete: 🔍

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