Apple iOS up to 9.3.2 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 was found in Apple iOS up to 9.3.2. It has been classified as problematic. This impacts an unknown function of the component libxml2. Performing a manipulation results in input validation (User). This vulnerability was named CVE-2016-4449. The attack needs to be approached locally. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Apple iOS up to 9.3.2 (Smartphone Operating System). This affects an unknown code block of the component libxml2. The manipulation with an unknown input leads to a input validation vulnerability (User). CWE is classifying the issue as 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. This is going to have an impact on confidentiality, and availability.

The weakness was presented 07/18/2016 by Daniel Veillard as HT206902 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is uniquely identified as CVE-2016-4449 since 05/02/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/05/2022). It is expected to see the exploit prices for this product increasing in the near future. 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 93154 (SUSE SLES11 Security Update : libxml2 (SUSE-SU-2016:1604-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE 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 9.3.3 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 (93154) and SecurityFocus (BID 90865†). See VDB-79335, VDB-79336, VDB-79337 and VDB-79338 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

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: 93154
Nessus Name: SUSE SLES11 Security Update : libxml2 (SUSE-SU-2016:1604-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: alas-2016-719
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: iOS 9.3.3
Patch: git.gnome.org

Timelineinfo

05/02/2016 🔍
05/23/2016 +21 days 🔍
06/09/2016 +17 days 🔍
07/18/2016 +39 days 🔍
07/18/2016 +0 days 🔍
07/19/2016 +1 days 🔍
08/29/2016 +41 days 🔍
09/05/2022 +2198 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT206902
Researcher: Daniel Veillard
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-4449 (🔍)
GCVE (CVE): GCVE-0-2016-4449
GCVE (VulDB): GCVE-100-89703

OVAL: 🔍

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

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

Entryinfo

Created: 07/19/2016 16:40
Updated: 09/05/2022 14:18
Changes: 07/19/2016 16:40 (61), 03/03/2019 10:20 (25), 09/05/2022 14:18 (6)
Complete: 🔍
Cache ID: 216:E15:103

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