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HTMLDOC: User-assisted execution of arbitrary code


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200909-12 / htmldoc
Release Date September 12, 2009
Latest Revision September 12, 2009: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
app-text/htmldoc < 1.8.27-r1 >= 1.8.27-r1 All supported architectures

Related bugreports: #278186


Multiple insecure calls to the sscanf() function in HTMLDOC might result in the execution of arbitrary code.

2.  Impact Information


HTMLDOC is a HTML indexer and HTML to PS and PDF converter.


ANTHRAX666 reported an insecure call to the sscanf() function in the set_page_size() function in htmldoc/util.cxx. Nico Golde of the Debian Security Team found two more insecure calls in the write_type1() function in htmldoc/ps-pdf.cxx and the htmlLoadFontWidths() function in htmldoc/htmllib.cxx.


A remote attacker could entice a user to process a specially crafted HTML file using htmldoc, possibly resulting in the execution of arbitrary code with the privileges of the user running the application. NOTE: Additional vectors via specially crafted AFM font metric files do not cross trust boundaries, as the files can only be modified by privileged users.

3.  Resolution Information


There is no known workaround at this time.


All HTMLDOC users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/htmldoc-1.8.27-r1"

4.  References


Page updated September 12, 2009

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