Apple tvOS up to 10.2.2 libexpat integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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9.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Apple tvOS up to 10.2.2. Impacted is an unknown function of the component libexpat. This manipulation causes integer overflow. This vulnerability is tracked as CVE-2016-9063. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical was found in Apple tvOS up to 10.2.2 (Digital Media Player). Affected by this vulnerability is an unknown functionality of the component libexpat. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An integer overflow during the parsing of XML using the Expat library. This vulnerability affects Firefox < 50.

The bug was discovered 11/15/2016. The weakness was disclosed 09/25/2017 by Abdulrahman Alqabandi (Nils) with Mozilla as HT208113 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2016-9063 since 10/27/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 01/20/2021). The advisory points out:

Multiple issues were addressed by updating to version 2.2.1

The vulnerability was handled as a non-public zero-day exploit for at least 22 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 95590 (openSUSE Security Update : Mozilla Firefox / Thunderbird and NSS (openSUSE-2016-1407)), 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 370225 (Mozilla Firefox Multiple Vulnerabilities (MFSA2016-89,MFSA2016-90)).

Upgrading to version 11.0 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 (95590) and SecurityFocus (BID 94337†). The entries VDB-93625, VDB-93628, VDB-93629 and VDB-93630 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
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: 95590
Nessus Name: openSUSE Security Update : Mozilla Firefox / Thunderbird and NSS (openSUSE-2016-1407)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 801105
OpenVAS Name: Apple Mac OS X Multiple Vulnerabilities-HT208144
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: tvOS 11.0

Timelineinfo

10/27/2016 🔍
11/15/2016 +19 days 🔍
11/15/2016 +0 days 🔍
12/07/2016 +22 days 🔍
09/25/2017 +292 days 🔍
09/25/2017 +0 days 🔍
10/23/2017 +28 days 🔍
06/11/2018 +231 days 🔍
01/20/2021 +954 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT208113
Researcher: Abdulrahman Alqabandi (Nils)
Organization: Mozilla
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-9063 (🔍)
GCVE (CVE): GCVE-0-2016-9063
GCVE (VulDB): GCVE-100-108487

OVAL: 🔍

SecurityFocus: 94337 - Mozilla Firefox Multiple Security Vulnerabilities
SecurityTracker: 1037298

See also: 🔍

Entryinfo

Created: 10/23/2017 11:51
Updated: 01/20/2021 09:15
Changes: 10/23/2017 11:51 (69), 11/29/2019 17:29 (19), 01/20/2021 09:15 (2)
Complete: 🔍
Cache ID: 216::103

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