Apple watchOS up to 3.2.3 libexpat xml external entity reference

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.
7.2$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Apple watchOS up to 3.2.3. Affected by this vulnerability is an unknown functionality of the component libexpat. Performing a manipulation results in xml external entity reference. This vulnerability is identified as CVE-2017-9233. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Apple watchOS up to 3.2.3 (Smartwatch Operating System). This affects some unknown processing of the component libexpat. The manipulation with an unknown input leads to a xml external entity reference vulnerability. CWE is classifying the issue as CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. This is going to have an impact on availability. The summary by CVE is:

XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.

The bug was discovered 06/18/2017. The weakness was released 09/25/2017 by Rhodri James as HT208115 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is uniquely identified as CVE-2017-9233 since 05/26/2017. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. 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 37 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 103424 (Slackware 14.0 / 14.1 / 14.2 / current : python (SSA:2017-266-02)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Slackware Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170320 (SUSE Enterprise Linux Security Update for expat (SUSE-SU-2017:2299-1)).

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 databases at Tenable (103424) and SecurityFocus (BID 99276†). Entries connected to this vulnerability are available at VDB-104507, VDB-108410, VDB-108465 and VDB-108466. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Xml external entity reference
CWE: CWE-611 / CWE-610
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 103424
Nessus Name: Slackware 14.0 / 14.1 / 14.2 / current : python (SSA:2017-266-02)
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

05/26/2017 🔍
06/18/2017 +23 days 🔍
06/26/2017 +8 days 🔍
07/25/2017 +29 days 🔍
09/25/2017 +62 days 🔍
09/25/2017 +0 days 🔍
09/25/2017 +0 days 🔍
10/23/2017 +28 days 🔍
01/20/2021 +1185 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT208115
Researcher: Rhodri James
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-9233 (🔍)
GCVE (CVE): GCVE-0-2017-9233
GCVE (VulDB): GCVE-100-108471

OVAL: 🔍

SecurityFocus: 99276 - Expat CVE-2017-9233 XML External Entity Denial of Service Vulnerability
SecurityTracker: 1039427

See also: 🔍

Entryinfo

Created: 10/23/2017 11:37
Updated: 01/20/2021 07:13
Changes: 10/23/2017 11:37 (80), 11/29/2019 16:02 (6), 01/20/2021 07:13 (3)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Might our Artificial Intelligence support you?

Check our Alexa App!