Apple Safari up to 11.1.0 WebKit memory corruption

Summaryinfo

A vulnerability described as critical has been identified in Apple Safari up to 11.1.0. This issue affects some unknown processing of the component WebKit. Such manipulation leads to memory corruption. This vulnerability is referenced as CVE-2018-4199. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Apple Safari up to 11.1.0 (Web Browser) and classified as critical. Affected by this issue is an unknown code block of the component WebKit. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability.

The bug was discovered 06/01/2018. The weakness was published 06/01/2018 by Alex Plaskett with Zero Day Initiative as HT208854 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability is handled as CVE-2018-4199 since 01/02/2018. 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 current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/20/2023). The advisory points out:

A buffer overflow issue was addressed with improved memory handling.

The vulnerability scanner Nessus provides a plugin with the ID 120240 (Fedora 28 : webkit2gtk3 (2018-118b9abf99)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370984 (Apple iCloud for Windows Prior to 7.5 Multiple Vulnerabilities(HT208853)).

Upgrading to version 11.1.1 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 (120240). Similar entries are available at VDB-118648, VDB-118652, VDB-118657 and VDB-118659. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Web Browser

Vendor

• Apple

Name

• Safari

Version

• 11.0
• 11.1.0

License

• commercial

Website

• Vendor: https://www.apple.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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