Summaryinfo

A vulnerability was found in Apple tvOS up to 11.3 and classified as problematic. This issue affects some unknown processing of the component WebKit. The manipulation leads to insufficiently protected credentials. The identification of this vulnerability is CVE-2018-4190. The attack may be initiated remotely. There is no exploit available. It is recommended to upgrade the affected component. Once again VulDB remains the best source for vulnerability data.

Detailsinfo

A vulnerability has been found in Apple tvOS up to 11.3 (Digital Media Player) and classified as problematic. This vulnerability affects an unknown code of the component WebKit. The manipulation with an unknown input leads to a insufficiently protected credentials vulnerability. The CWE definition for the vulnerability is CWE-522. The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval. As an impact it is known to affect confidentiality.

The bug was discovered 06/01/2018. The weakness was released 05/29/2018 as HT208850 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability was named CVE-2018-4190 since 01/02/2018. The attack can be initiated remotely. No form of authentication is required for a successful 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 T1552. The advisory points out:

Credentials were unexpectedly sent when fetching CSS mask images. This was addressed by using a CORS-enabled fetch method.

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 11.4 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). Entries connected to this vulnerability are available at VDB-118648, VDB-118652, VDB-118657 and VDB-118659. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Digital Media Player

Vendor

• Apple

Name

• tvOS

Version

• 11.0
• 11.1
• 11.2
• 11.3

License

• commercial

CPE 2.3info

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CPE 2.2info

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