Apple Safari up to 10.0 WebKit resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Apple Safari up to 10.0. The affected element is an unknown function of the component WebKit. Such manipulation leads to resource consumption. This vulnerability is listed as CVE-2016-9643. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Apple Safari up to 10.0 (Web Browser). Affected by this issue is an unknown function of the component WebKit. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is confidentiality. CVE summarizes:

The regex code in Webkit 2.4.11 allows remote attackers to cause a denial of service (memory consumption) as demonstrated in a large number of ($ (open parenthesis and dollar) followed by {-2,16} and a large number of +) (plus close parenthesis).

The bug was discovered 03/07/2017. The weakness was presented 03/27/2017 by Gustavo Grieco as HT207600 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability is handled as CVE-2016-9643 since 11/26/2016. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499. The advisory points out:

An uncontrolled resource consumption issue was addressed through improved regex processing.

The vulnerability scanner Nessus provides a plugin with the ID 99167 (macOS : Apple Safari < 10.1 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196754 (Ubuntu Security Notification for Webkit2gtk Vulnerabilities (USN-3257-1)).

Upgrading to version 10.1 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 (99167) and SecurityFocus (BID 94559†). See VDB-95939, VDB-96539, VDB-97603 and VDB-98600 for similar entries. Once again VulDB remains the best 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: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
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: 99167
Nessus Name: macOS : Apple Safari < 10.1 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802925
OpenVAS Name: Apple Safari Multiple Vulnerabilities-HT207600
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: Safari 10.1

Timelineinfo

11/26/2016 🔍
11/28/2016 +2 days 🔍
03/07/2017 +99 days 🔍
03/07/2017 +0 days 🔍
03/27/2017 +20 days 🔍
03/27/2017 +0 days 🔍
03/28/2017 +1 days 🔍
04/03/2017 +6 days 🔍
11/15/2022 +2052 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT207600
Researcher: Gustavo Grieco
Status: Confirmed

CVE: CVE-2016-9643 (🔍)
GCVE (CVE): GCVE-0-2016-9643
GCVE (VulDB): GCVE-100-98588
SecurityFocus: 94559 - WebKit CVE-2016-9643 Denial of Service Vulnerability
OSVDB: - CVE-2016-9643 - Webkit - Denial of Service Issue
SecurityTracker: 1038137

See also: 🔍

Entryinfo

Created: 03/28/2017 10:39
Updated: 11/15/2022 14:32
Changes: 03/28/2017 10:39 (69), 08/20/2020 15:12 (15), 11/15/2022 14:32 (3)
Complete: 🔍
Cache ID: 216::103

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