Cristian Gafton
writes:
-----BEGIN PGP SIGNED MESSAGE----- Red Hat Linux Security Update I. Risk level: SMALL ~~~~~~~~~~~~~~~~~~~~ The default configuration as shipped with the supported releases of Red Hat Linux is not vulnerable to this problem. II. Description ~~~~~~~~~~~~~~~ A race condition that can be exploited under some particular scenarios has been identified in all versions of the Linux-PAM library shipped with all versions of Red Hat Linux. The vulnerability is exhibited in the pam_unix_passwd.so module included in Red Hat Linux, but *not* used by either of the 4.2 or 5.x releases. Red Hat Linux uses the pam_pwdb.so module for performing PAM authentication. You are at risk if you enabled pam_unix_passwd.so and are using it instead of the pam_pwdb.so module. An exploit occurs when an user with a umask setting of 0 is trying to change the login password. As of this release there are no known exploits of this security problem. III. Solution ~~~~~~~~~~~~~ All users of Red Hat Linux are encouraged to upgrade to the new package releases immediately. As always, these packages have been signed with the Red Hat PGP key. Red Hat Linux 5.0, 5.1 and 5.2: =============================== alpha: rpm -Uvh ftp://updates.redhat.com/5.2/alpha/pam-0.64-4.alpha.rpm i386: rpm -Uvh ftp://updates.redhat.com/5.2/i386/pam-0.64-4.i386.rpm sparc: rpm -Uvh ftp://updates.redhat.com/5.2/sparc/pam-0.64-4.sparc.rpm Source rpm: rpm -Uvh ftp://updates.redhat.com/5.2/SRPMS/pam-0.64-4.src.rpm Red Hat Linux 4.2: ================== alpha: rpm -Uvh ftp://updates.redhat.com/4.2/alpha/pam-0.57-5.alpha.rpm i386: rpm -Uvh ftp://updates.redhat.com/4.2/i386/pam-0.57-5.i386.rpm sparc: rpm -Uvh ftp://updates.redhat.com/4.2/sparc/pam-0.57-5.sparc.rpm Source rpm: rpm -Uvh ftp://updates.redhat.com/4.2/SRPMS/pam-0.57-5.src.rpm Cristian - -- - ---------------------------------------------------------------------- Cristian Gafton -- gafton@redhat.com -- Red Hat Software, Inc. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ UNIX is user friendly. It's just selective about who its friends are. -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBNolxrvGvxKXU9NkBAQGLfAP/SDPwxbRGX3+FDeDuFtYG7C/Bjsqnh2dq Jqd+T3KzsQvAS7HKj2VBCivO2aus/0hR9A/IbNQ2DpSvGkyZBxjyN0JV/sfRap7I YD6iHZ+3qD7l+IsJbYuzSZWJ7OFWSwOYeQZJvcNpuRvxR6QSiZqXIGQ2orXQBz2N 5B7NqCXABsI= =wah5 -----END PGP SIGNATURE-----