From: Progeny Security Team <security@progeny.com>
To: progeny-security-announce@lists.progeny.com, bugtraq@securityfocus.com,
linuxlist@securityportal.com
Subject: PROGENY-SA-2001-33: groff format string bug
Date: Thu, 16 Aug 2001 15:07:20 -0500 (EST)
Cc: Progeny Security Team <security@progeny.com>
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PROGENY SERVICE NETWORK -- SECURITY ADVISORY PROGENY-SA-2001-33
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Synopsis: groff format string bug
Software: groff
History:
2001-07-05 Vulnerability announced
2001-08-14 Update available in Progeny archive
2001-08-16 Advisory released
Credits: zen-parse@gmx.net
Affects: Progeny Debian (groff prior to 1.17.2-6)
Progeny Only: NO
Vendor-Status: New Version Released
(groff_1.17.2-6)
$Progeny: security/advisory/PROGENY-SA-2001-33,v 1.9 2001/08/16 16:47:35 dsp Exp $
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SUMMARY
groff, the GNU version of troff, has the potential of a remotely
exploitable vulnerability in Progeny versions prior to 1.17.2-6 if being
used with certain configurations of lpd.
DETAILED DESCRIPTION
The pic command is vulnerable to a printf format string attack which
can circumvent the -S option. This may be exploited by remote users
to gain elevated privileges an execute arbitrary code.
SOLUTION (See also: UPDATING VIA APT-GET)
Upgrade to a fixed version of groff. groff version 1.17.2-6
corrects the problem. For your convenience, you may upgrade to the
groff_1.17.2-6 package.
UPDATING VIA APT-GET
1. Ensure that your /etc/apt/sources.list file has a URI for Progeny's
update repository:
deb http://archive.progeny.com/progeny updates/newton/
2. Update your cache of available packages for apt(8).
Example:
# apt-get update
3. Using apt(8), install the new package. apt(8) will download the
update, verify its integrity with md5, and then install the
package on your system with dpkg(8).
Example:
# apt-get install groff
UPDATING VIA DPKG
1. Use your preferred FTP/HTTP client to retrieve the following
updated files from Progeny's update archive at:
http://archive.progeny.com/progeny/updates/newton/
MD5 Checksum Filename
-------------------------------- -------------------------------------
534cc0161fef71e64747938be33bf782 groff-base_1.17.2-6_i386.deb
277aba2ede78bc5b5035df566aacbb07 groff_1.17.2-6_i386.deb
674fb9f76dce60c0c8cd3604d4f092be groff-x11_1.17.2-6_i386.deb
Example:
$ wget \
http://archive.progeny.com/progeny/updates/newton/groff_1.17.2-6_i386.deb
2. Use the md5sum(1) command on the retrieved files to verify that
they match the MD5 checksum provided in this advisory:
Example:
$ md5sum groff_1.17.2-6_i386.deb
3. Then install the replacement package(s) using dpkg(8).
Example:
# dpkg --install groff_1.17.2-6_i386.deb
WORKAROUND
No known workaround exists for this vulnerability.
MORE INFORMATION
Progeny advisories can be found at http://www.progeny.com/security/.
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pub 1024D/F92D4D1F 2001-04-04 Progeny Security Team <security@progeny.com>
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