Foo Labs Xpdf 4.00 PDF File XRef.cc XRef::readXRefStream integer overflow

Summaryinfo

A vulnerability described as critical has been identified in Foo Labs Xpdf 4.00. The affected element is the function XRef::readXRefStream of the file XRef.cc of the component PDF File Handler. Executing a manipulation can lead to integer overflow. This vulnerability is handled as CVE-2018-18650. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in Foo Labs Xpdf 4.00 (Document Reader Software). This vulnerability affects the function XRef::readXRefStream of the file XRef.cc of the component PDF File Handler. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in Xpdf 4.00. XRef::readXRefStream in XRef.cc allows attackers to launch a denial of service (Integer Overflow) via a crafted /Size value in a pdf file, as demonstrated by pdftohtml. This is mainly caused by the program attempting a malloc operation for a large amount of memory.

The bug was discovered 10/25/2018. The weakness was released 10/25/2018 (Website). The advisory is shared for download at forum.xpdfreader.com. This vulnerability was named CVE-2018-18650 since 10/25/2018. 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 known technical details, but no exploit is available.

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

Entry connected to this vulnerability is available at VDB-125957. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Document Reader Software

Vendor

• Foo Labs

Name

• Xpdf

Version

• 4.00

License

• open-source

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion