[ GLSA 200508-08 ] Xpdf, Kpdf, GPdf: Denial of Service vulnerability

[GLSA]

Gentoo Linux Security Advisory

Title: Xpdf, Kpdf, GPdf: Denial of Service vulnerability (GLSA 200508-08)
Severity: normal
Exploitable: remote
Date: August 16, 2005
Bug(s): #99769, #100263, #100265
ID: 200508-08

Synopsis

Xpdf, Kpdf and GPdf may crash as a result of a Denial of Service vulnerability.

Background

Xpdf, Kpdf and GPdf are PDF file viewers that run under the X Window System. Kpdf and GPdf both contain Xpdf code. Kpdf is also part of kdegraphics.

Affected Packages

Package: app-text/xpdf
Vulnerable: < 3.00-r10
Unaffected: >= 3.00-r10
Architectures: All supported architectures

Package: kde-base/kdegraphics
Vulnerable: < 3.3.2-r3
Unaffected: >= 3.3.2-r3
Architectures: All supported architectures

Package: kde-base/kpdf
Vulnerable: < 3.4.1-r1
Unaffected: >= 3.4.1-r1
Architectures: All supported architectures

Package: app-text/gpdf
Vulnerable: < 2.10.0-r1
Unaffected: >= 2.10.0-r1
Architectures: All supported architectures


Description

Xpdf, Kpdf and GPdf do not handle a broken table of embedded TrueType fonts correctly. After detecting such a table, Xpdf, Kpdf and GPdf attempt to reconstruct the information in it by decoding the PDF file, which causes the generation of a huge temporary file.

Impact

A remote attacker may cause a Denial of Service by creating a specially crafted PDF file, sending it to a CUPS printing system (which uses Xpdf), or by enticing a user to open it in Xpdf, Kpdf, or GPdf.

Workaround

There is no known workaround at this time.

Resolution

All Xpdf users should upgrade to the latest version: