Apple tvOS up to 9.2.1 libxml2 User input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Apple tvOS up to 9.2.1. The affected element is an unknown function of the component libxml2. This manipulation causes input validation (User). This vulnerability is handled as CVE-2016-4449. It is possible to launch the attack on the local host. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Apple tvOS up to 9.2.1 (Digital Media Player). Affected by this vulnerability is an unknown code of the component libxml2. The manipulation with an unknown input leads to a input validation vulnerability (User). The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, and availability.

The weakness was released 07/18/2016 by Daniel Veillard as HT206905 as confirmed advisory (Website). The advisory is shared at support.apple.com. This vulnerability is known as CVE-2016-4449 since 05/02/2016. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The advisory points out:

An access issue existed in the parsing of maliciously crafted XML files. This issue was addressed through improved input validation.

The vulnerability scanner Nessus provides a plugin with the ID 92221 (Amazon Linux AMI : libxml2 (ALAS-2016-719)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43650 (Juniper Junos Multiple vulnerabilities in libxml2 (JSA10916)).

Upgrading to version 9.2.2 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 (92221) and SecurityFocus (BID 90865†). Entries connected to this vulnerability are available at VDB-79335, VDB-79336, VDB-79337 and VDB-79338. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.9

VulDB Base Score: 7.1
VulDB Temp Score: 6.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.1
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: User
Class: Input validation / User
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 92221
Nessus Name: Amazon Linux AMI : libxml2 (ALAS-2016-719)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703593
OpenVAS Name: Debian Security Advisory DSA 3593-1 (libxml2 - security update)
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: tvOS 9.2.2
Patch: git.gnome.org

Timelineinfo

05/02/2016 🔍
05/23/2016 +21 days 🔍
06/09/2016 +17 days 🔍
07/15/2016 +36 days 🔍
07/18/2016 +3 days 🔍
07/18/2016 +0 days 🔍
07/19/2016 +1 days 🔍
09/06/2022 +2240 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT206905
Researcher: Daniel Veillard
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-4449 (🔍)
GCVE (CVE): GCVE-0-2016-4449
GCVE (VulDB): GCVE-100-89821

OVAL: 🔍

SecurityFocus: 90865 - Libxml2 'xmlLoadEntityContent()' Function CVE-2016-4449 Security Bypass Vulnerability
SecurityTracker: 1036348

See also: 🔍

Entryinfo

Created: 07/19/2016 19:48
Updated: 09/06/2022 14:29
Changes: 07/19/2016 19:48 (71), 03/04/2019 06:58 (14), 09/06/2022 14:29 (6)
Complete: 🔍
Cache ID: 216::103

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