Apple iOS up to 10.3.3 libexpat integer overflow

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.4$25k-$100k0.00

A vulnerability has been found in Apple iOS up to 10.3.3 (Smartphone Operating System) and classified as very critical. Affected by this vulnerability is an unknown function 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 shared 09/25/2017 by Abdulrahman Alqabandi (Nils) with Mozilla as HT208112 as confirmed advisory (Website). The advisory is shared 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. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 01/19/2021). It is expected to see the exploit prices for this product increasing in the near future. 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 $100k and more. 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 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). The entries 93625, 93628, 93629 and 93630 are related to this item.

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

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

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: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

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: iOS 11

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 🔍
01/19/2021 +953 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT208112
Researcher: Abdulrahman Alqabandi (Nils)
Organization: Mozilla
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-9063 (🔍)
OVAL: 🔍

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

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

Entryinfo

Created: 10/23/2017 11:19
Updated: 01/19/2021 15:07
Changes: 10/23/2017 11:19 (70), 11/29/2019 09:42 (19), 01/19/2021 15:07 (2)
Complete: 🔍

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!