Foxit Reader 9.0.1.1049 rect use after free

Summaryinfo

A vulnerability marked as critical has been reported in Foxit Reader 9.0.1.1049. Affected is an unknown function. This manipulation of the argument rect causes use after free. The identification of this vulnerability is CVE-2018-9961. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical was found in Foxit Reader 9.0.1.1049 (Document Reader Software). Affected by this vulnerability is an unknown code. The manipulation of the argument rect with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.1049. 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 parsing of the rect Field attribute. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code under the context of the current process. Was ZDI-CAN-5434.

The bug was discovered 04/20/2018. The weakness was shared 05/17/2018 as confirmed security bulletin (Website). It is possible to read the advisory at foxitsoftware.com. This vulnerability is known as CVE-2018-9961 since 04/10/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 27 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370903 (Foxit Reader Multiple Vulnerabilities).

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

The entries VDB-82783, VDB-82784, VDB-82785 and VDB-82786 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Document Reader Software

Vendor

• Foxit

Name

• Reader

Version

• 9.0.1.1049

License

• free

Website

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

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