-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ________________________________________________________________________ OpenPKG Security Advisory The OpenPKG Project http://www.openpkg.org/security.html http://www.openpkg.org openpkg-security@openpkg.org openpkg@openpkg.org OpenPKG-SA-2003.031 11-Jun-2003 ________________________________________________________________________ Package: gzip Vulnerability: insecure creation of temporary files OpenPKG Specific: no Affected Releases: Affected Packages: Corrected Packages: OpenPKG CURRENT <= gzip-1.3.5-20030409 >= gzip-1.3.5-20030610 OpenPKG 1.2 <= gzip-1.3.5-1.2.0 >= gzip-1.3.5-1.2.1 OpenPKG 1.1 <= gzip-1.3.3-1.1.0 >= gzip-1.3.3-1.1.1 Dependent Packages: none Description: According to a Debian security advisory [0], based on hints from Paul Szabo, a vulnerability exists in the creation of temporary files in the znew(1) utility contained in GNU Zip (gzip) [1]. The GNU Bash based znew(1) shell script tried to prevent itself from overwriting existing files on shell redirection by using the POSIX "noclobber" shell option, but accidentally forgot to check for the results, and in case of existing files, stop further processing. This allowed a classical "symlink" attack. The Common Vulnerabilities and Exposures (CVE) project assigned the id CAN-2003-0367 [2] to the problem. Please check whether you are affected by running "<prefix>/bin/rpm -q gzip". If you have the "gzip" package installed and its version is affected (see above), we recommend that you immediately upgrade it (see Solution). [3][4] Solution: Select the updated source RPM appropriate for your OpenPKG release [5][6], fetch it from the OpenPKG FTP service [7][8] or a mirror location, verify its integrity [9], build a corresponding binary RPM from it [3] and update your OpenPKG installation by applying the binary RPM [4]. For the current release OpenPKG 1.2, perform the following operations to permanently fix the security problem (for other releases adjust accordingly). $ ftp ftp.openpkg.org ftp> bin ftp> cd release/1.2/UPD ftp> get gzip-1.3.5-1.2.1.src.rpm ftp> bye $ <prefix>/bin/rpm -v --checksig gzip-1.3.5-1.2.1.src.rpm $ <prefix>/bin/rpm --rebuild gzip-1.3.5-1.2.1.src.rpm $ su - # <prefix>/bin/rpm -Fvh <prefix>/RPM/PKG/gzip-1.3.5-1.2.1.*.rpm ________________________________________________________________________ References: [0] http://www.debian.org/security/2003/dsa-308 [1] http://www.gzip.org/ [2] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0367 [3] http://www.openpkg.org/tutorial.html#regular-source [4] http://www.openpkg.org/tutorial.html#regular-binary [5] ftp://ftp.openpkg.org/release/1.1/UPD/gzip-1.3.3-1.1.1.src.rpm [6] ftp://ftp.openpkg.org/release/1.2/UPD/gzip-1.3.5-1.2.1.src.rpm [7] ftp://ftp.openpkg.org/release/1.1/UPD/ [8] ftp://ftp.openpkg.org/release/1.2/UPD/ [9] http://www.openpkg.org/security.html#signature ________________________________________________________________________ For security reasons, this advisory was digitally signed with the OpenPGP public key "OpenPKG <openpkg@openpkg.org>" (ID 63C4CB9F) of the OpenPKG project which you can retrieve from http://pgp.openpkg.org and hkp://pgp.openpkg.org. Follow the instructions on http://pgp.openpkg.org/ for details on how to verify the integrity of this advisory. ________________________________________________________________________ -----BEGIN PGP SIGNATURE----- Comment: OpenPKG <openpkg@openpkg.org> iD8DBQE+5wxwgHWT4GPEy58RAo7HAJ9wSKcl4OYE8REbyFh78RLVdUrgkwCggtov FVTXv08CamBk5CgoW3mYDWM= =ClM5 -----END PGP SIGNATURE-----
