From e89d4c97385ff8180e6e81e84c5aa745daf28a79 Mon Sep 17 00:00:00 2001 From: Thorsten Kukuk Date: Mon, 22 Jun 2015 14:53:01 +0200 Subject: Release version 1.2.1 Security fix: CVE-2015-3238 If the process executing pam_sm_authenticate or pam_sm_chauthtok method of pam_unix is not privileged enough to check the password, e.g. if selinux is enabled, the _unix_run_helper_binary function is called. When a long enough password is supplied (16 pages or more, i.e. 65536+ bytes on a system with 4K pages), this helper function hangs indefinitely, blocked in the write(2) call while writing to a blocking pipe that has a limited capacity. With this fix, the verifiable password length will be limited to PAM_MAX_RESP_SIZE bytes (i.e. 512 bytes) for pam_exec and pam_unix. * NEWS: Update * configure.ac: Bump version * modules/pam_exec/pam_exec.8.xml: document limitation of password length * modules/pam_exec/pam_exec.c: limit password length to PAM_MAX_RESP_SIZE * modules/pam_unix/pam_unix.8.xml: document limitation of password length * modules/pam_unix/pam_unix_passwd.c: limit password length * modules/pam_unix/passverify.c: Likewise * modules/pam_unix/passverify.h: Likewise * modules/pam_unix/support.c: Likewise --- NEWS | 3 +++ 1 file changed, 3 insertions(+) (limited to 'NEWS') diff --git a/NEWS b/NEWS index 9de2713d..5349d031 100644 --- a/NEWS +++ b/NEWS @@ -1,5 +1,8 @@ Linux-PAM NEWS -- history of user-visible changes. +Release 1.2.1 +* Fix CVE-2015-3238, affected PAM modules are pam_unix and pam_exec + Release 1.2.0 * Update documentation * Update translations -- cgit v1.2.3