Foxit Reader 9.0.0.29935 U3D File use after free

Summaryinfo

A vulnerability classified as critical has been found in Foxit Reader 9.0.0.29935. This issue affects some unknown processing of the component U3D File Handler. The manipulation leads to use after free. This vulnerability is referenced as CVE-2018-9977. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Foxit Reader 9.0.0.29935 (Document Reader Software). It has been rated as critical. This issue affects some unknown processing of the component U3D File Handler. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.0.29935. 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 Modifier Chain objects in U3D files. 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-5427.

The bug was discovered 05/04/2018. The weakness was published 05/17/2018 as confirmed security bulletin (Website). It is possible to read the advisory at foxitsoftware.com. The identification of this vulnerability is CVE-2018-9977 since 04/10/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 13 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 370955 (Foxit Reader sensitive information disclosure vulnerability).

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

Similar entries are available at VDB-82783, VDB-82784, VDB-82785 and VDB-82786. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Document Reader Software

Vendor

• Foxit

Name

• Reader

Version

• 9.0.0.29935

License

• free

Website

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

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