Apple Safari up to 9.1.0 WebKit Canvas memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.6$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Apple Safari up to 9.1.0. Affected is an unknown function of the component WebKit Canvas. Performing a manipulation results in memory corruption. This vulnerability is reported as CVE-2016-1859. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Apple Safari up to 9.1.0 (Web Browser). This affects some unknown functionality of the component WebKit Canvas. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The WebKit Canvas implementation in Apple iOS before 9.3.2, Safari before 9.1.1, and tvOS before 9.2.1 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site.

The weakness was disclosed 05/16/2016 with Zero Day Initiative as HT206565 as confirmed advisory (Website). The advisory is shared at support.apple.com. This vulnerability is uniquely identified as CVE-2016-1859 since 01/13/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/21/2022). The advisory points out:

Multiple memory corruption issues were addressed through improved memory handling.

The vulnerability scanner Nessus provides a plugin with the ID 91311 (Apple TV < 9.2.1 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370008 (Apple Safari 9.1.1 Not Installed (APPLE-SA-2016-05-16-5)).

Upgrading to version 9.1.1 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 (91311). The entries VDB-87444, VDB-87451, VDB-87453 and VDB-87455 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.6

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 91311
Nessus Name: Apple TV < 9.2.1 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 864497
OpenVAS Name: Ubuntu Update for webkit2gtk USN-3079-1
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 9.1.1

Timelineinfo

01/13/2016 🔍
05/16/2016 +124 days 🔍
05/16/2016 +0 days 🔍
05/18/2016 +2 days 🔍
05/20/2016 +2 days 🔍
05/24/2016 +4 days 🔍
08/21/2022 +2280 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT206565
Organization: Zero Day Initiative
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-1859 (🔍)
GCVE (CVE): GCVE-0-2016-1859
GCVE (VulDB): GCVE-100-87537
SecurityTracker: 1035888

See also: 🔍

Entryinfo

Created: 05/18/2016 12:55
Updated: 08/21/2022 11:13
Changes: 05/18/2016 12:55 (69), 12/02/2018 09:51 (10), 08/21/2022 11:13 (3)
Complete: 🔍
Cache ID: 216:3FC:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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