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Slackware Linux Advisory: unzip

Aug 26, 2003, 14:59 (0 Talkback[s])

[slackware-security] unzip vulnerability patched (SSA:2003-237-01)

Upgraded infozip packages are available for Slackware 9.0 and -current. These fix a security issue where a specially crafted archive may overwrite files (including system files anywhere on the filesystem) upon extraction by a user with sufficient permissions.

For more information, see:

http://www.securityfocus.com/bid/7550
http://lwn.net/Articles/38540/
http://xforce.iss.net/xforce/xfdb/12004
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0282

Here are the details from the Slackware 9.0 ChangeLog:

+--------------------------+
Mon Aug 25 15:35:28 PDT 2003
patches/packages/infozip-5.50-i486-2.tgz: Fixed a bug where a specially crafted archive might try to write to ../ or ../../, etc, potentially overwriting system files if the user (such as root) has permissions to overwrite them. Thanks to jelmer for locating this problem, and Ben Laurie for providing a patch.
(* Security fix *)
+--------------------------+

WHERE TO FIND THE NEW PACKAGES:

Updated package for Slackware 9.0:
ftp://ftp.slackware.com/pub/slackware/slackware-9.0/patches/packages/infozip-5.50-i386-2.tgz

Updated package for Slackware -current: ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/a/infozip-5.50-i486-2.tgz

MD5 SIGNATURES:

Slackware 9.0 package:
d262ae0564f475b39e2ccf20fe1dfc41 infozip-5.50-i386-2.tgz

Slackware -current package:
8c4b4fc48e145a71e962cd7f99be8a5b infozip-5.50-i486-2.tgz

INSTALLATION INSTRUCTIONS:

Upgrade using upgradepkg (as root):
upgradepkg infozip-5.50-i386-2.tgz

+-----+

Slackware Linux Security Team
http://slackware.com/gpg-key
security@slackware.com