Foo Labs Xpdf 4.00 PDF File Object.h Object::isName out-of-bounds

Summaryinfo

A vulnerability labeled as critical has been found in Foo Labs Xpdf 4.00. This vulnerability affects the function Object::isName of the file Object.h of the component PDF File Handler. Such manipulation leads to out-of-bounds. This vulnerability is traded as CVE-2018-18456. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Foo Labs Xpdf 4.00 (Document Reader Software) and classified as critical. Affected by this issue is the function Object::isName of the file Object.h of the component PDF File Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The function Object::isName() in Object.h (called from Gfx::opSetFillColorN) in Xpdf 4.00 allows remote attackers to cause a denial of service (stack-based buffer over-read) via a crafted pdf file, as demonstrated by pdftoppm.

The bug was discovered 10/16/2018. The weakness was shared 10/18/2018 (Website). The advisory is shared for download at forum.xpdfreader.com. This vulnerability is handled as CVE-2018-18456 since 10/18/2018. 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 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 232177 (Linux Distros Unpatched Vulnerability : CVE-2018-18456), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the vulnerability database at Tenable (232177). The entries VDB-125742, VDB-125743, VDB-125745 and VDB-125746 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Document Reader Software

Vendor

• Foo Labs

Name

• Xpdf

Version

• 4.00

License

• open-source

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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