Apple tvOS up to 14.7 libexpat denial of service

Summaryinfo

A vulnerability classified as problematic has been found in Apple tvOS up to 14.7. This affects an unknown function of the component libexpat. Performing a manipulation results in denial of service. This vulnerability is reported as CVE-2013-0340. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple tvOS up to 14.7 (Digital Media Player). It has been classified as problematic. This affects some unknown processing of the component libexpat. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

expat before version 2.4.0 does not properly handle entities expansion unless an application developer uses the XML_SetEntityDeclHandler function, which allows remote attackers to cause a denial of service (resource consumption), send HTTP requests to intranet servers, or read arbitrary files via a crafted XML document, aka an XML External Entity (XXE) issue. NOTE: it could be argued that because expat already provides the ability to disable external entity expansion, the responsibility for resolving this issue lies with application developers; according to this argument, this entry should be REJECTed, and each affected application would need its own CVE.

The weakness was disclosed 09/20/2021 as HT212815 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is uniquely identified as CVE-2013-0340. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK. The advisory points out:

A remote attacker may be able to cause a denial of service

The vulnerability scanner Nessus provides a plugin with the ID 276721 (RHEL 9 : expat (RHSA-2025:22035)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 15.0 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

This issue was addressed by updating expat to version 2.4.1.

The vulnerability is also documented in the vulnerability database at Tenable (276721). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Digital Media Player

Vendor

• Apple

Name

• tvOS

Version

• 14.0
• 14.1
• 14.2
• 14.3
• 14.4
• 14.5
• 14.6
• 14.7

License

• commercial

Website

• Vendor: https://www.apple.com/

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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