Foxit Reader 9.0.1.1049 ConvertToPdf_x86.dll memory corruption

Summaryinfo

A vulnerability labeled as critical has been found in Foxit Reader 9.0.1.1049. Affected by this issue is some unknown functionality in the library ConvertToPdf_x86.dll. Such manipulation leads to memory corruption. This vulnerability is uniquely identified as CVE-2018-9974. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Foxit Reader 9.0.1.1049 (Document Reader Software) and classified as critical. Affected by this issue is an unknown part in the library ConvertToPdf_x86.dll. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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 ConvertToPDF_x86.dll. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-5895.

The bug was discovered 04/20/2018. The weakness was disclosed 05/17/2018 as confirmed security bulletin (Website). The advisory is shared for download at foxitsoftware.com. This vulnerability is handled as CVE-2018-9974 since 04/10/2018. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

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 pretty similar. Once again VulDB remains the best 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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Once again VulDB remains the best source for vulnerability data.

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