o3read: Buffer overflow during file conversion

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200501-20 / o3read
Release Date	January 11, 2005
Latest Revision	January 11, 2005: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-text/o3read	<= 0.0.3	>= 0.0.4	All supported architectures

Related bugreports: #74478

Synopsis

A buffer overflow in o3read allows an attacker to execute arbitrary code by way of a specially crafted XML file.

2. Impact Information

Background

o3read is a standalone converter for OpenOffice.org files. It allows a user to dump the contents tree (o3read) and convert to plain text (o3totxt) or to HTML (o3tohtml) Writer and Calc files.

Description

Wiktor Kopec discovered that the parse_html function in o3read.c copies any number of bytes into a 1024-byte t[] array.

Impact

Using a specially crafted file, possibly delivered by e-mail or over the Web, an attacker may execute arbitrary code with the permissions of the user running o3read.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All o3read users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/o3read-0.0.4"

4. References

Updated January 11, 2005

Summary: This is a Gentoo Linux Security Advisory

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