Apple watchOS up to 3.2.3 libexpat integer overflow

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

A vulnerability, which was classified as very critical, has been found in Apple watchOS up to 3.2.3 (Smartwatch Operating System). Affected by this issue is an unknown code block of the component libexpat. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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 published 09/25/2017 by Abdulrahman Alqabandi (Nils) with Mozilla as HT208115 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability is handled as CVE-2016-9063 since 10/27/2016. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of 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 4.0 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 (95590). Similar entries are available at 93625, 93628, 93629 and 93630.

Productinfo

Type

Vendor

Name

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: 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
ATT&CK: Unknown

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: watchOS 4.0

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 +230 days 🔍
01/20/2021 +954 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT208115
Researcher: Abdulrahman Alqabandi (Nils)
Organization: Mozilla
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-9063 (🔍)
OVAL: 🔍

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

See also: 🔍

Entryinfo

Created: 10/23/2017 11:37
Updated: 01/20/2021 07:09
Changes: 10/23/2017 11:37 (80), 11/29/2019 15:58 (8), 01/20/2021 07:09 (2)
Complete: 🔍

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