Foo Labs Xpdf 4.00 PDF File GfxState.cc GfxImageColorMap out-of-bounds

Summaryinfo

A vulnerability identified as critical has been detected in Foo Labs Xpdf 4.00. This affects the function GfxImageColorMap of the file GfxState.cc of the component PDF File Handler. This manipulation causes out-of-bounds. This vulnerability appears as CVE-2018-18455. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability has been found in Foo Labs Xpdf 4.00 (Document Reader Software) and classified as critical. Affected by this vulnerability is the function GfxImageColorMap of the file GfxState.cc of the component PDF File Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The GfxImageColorMap class in GfxState.cc in Xpdf 4.00 allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted pdf file, as demonstrated by pdftoppm.

The bug was discovered 10/16/2018. The weakness was presented 10/18/2018 (Website). It is possible to read the advisory at forum.xpdfreader.com. This vulnerability is known as CVE-2018-18455 since 10/18/2018. 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 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 232051 (Linux Distros Unpatched Vulnerability : CVE-2018-18455), 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 (232051). See VDB-125742, VDB-125744, VDB-125745 and VDB-125746 for similar entries. Be aware that VulDB is the high quality 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

• 🔍
• 🔍

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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