Foo Labs Xpdf 4.00 splash/SplashXPath.cc strokeAdjust PDF File memory corruption

Summaryinfo

A vulnerability has been found in Foo Labs Xpdf 4.00 and classified as critical. This vulnerability affects the function SplashXPath::strokeAdjust of the file splash/SplashXPath.cc. This manipulation as part of PDF File causes memory corruption. This vulnerability is handled as CVE-2018-16368. The attack can be initiated remotely. There is not any exploit available.

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 SplashXPath::strokeAdjust of the file splash/SplashXPath.cc. The manipulation as part of a PDF File leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

SplashXPath::strokeAdjust in splash/SplashXPath.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 08/22/2018. The weakness was released 09/03/2018 (GitHub Repository). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2018-16368 since 09/02/2018. 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 11 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 232061 (Linux Distros Unpatched Vulnerability : CVE-2018-16368), which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277720 (Fedora Security Update for xpdf (FEDORA-2019-b3aec99d2c)).

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 (232061). Entries connected to this vulnerability are available at VDB-113498, VDB-113499, VDB-113500 and VDB-113791. 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

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• 🔍

CPE 2.2info

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

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