Foxit Reader 9.4.1.16828 XFA Template Object out-of-bounds write

Summaryinfo

A vulnerability was found in Foxit Reader 9.4.1.16828 and classified as critical. Affected by this vulnerability is an unknown functionality of the component XFA Template Handler. Executing a manipulation as part of Object can lead to out-of-bounds write. This vulnerability is handled as CVE-2019-6764. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Foxit Reader 9.4.1.16828 (Document Reader Software). It has been declared as critical. This vulnerability affects an unknown code of the component XFA Template Handler. The manipulation as part of a Object leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.4.1.16828. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the processing of XFA Template objects. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated structure. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-7972.

The bug was discovered 04/29/2019. The weakness was released 06/03/2019. This vulnerability was named CVE-2019-6764 since 01/24/2019. 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 vulnerability was handled as a non-public zero-day exploit for at least 35 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Entries connected to this vulnerability are available at VDB-135920, VDB-135919, VDB-135918 and VDB-135915. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Document Reader Software

Vendor

• Foxit

Name

• Reader

Version

• 9.4.1.16828

License

• free

Website

• Vendor: https://www.foxitsoftware.com/

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Once again VulDB remains the best source for vulnerability data.

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