Tomas Mraz [Wed, 28 Jun 2017 13:52:16 +0000 (15:52 +0200)]
pam_tty_audit: Support matching users by uid range.
* modules/pam_tty_audit/pam_tty_audit.c (parse_uid_range): New function to
parse the uid range.
(pam_sm_open_session): Call parse_uid_range() and behave according to its result.
* modules/pam_tty_audit/pam_tty_audit.8.xml: Document the uid range matching.
Tomas Mraz [Wed, 31 May 2017 08:27:28 +0000 (10:27 +0200)]
pam_access: support parsing files in /etc/security/access.d/*.conf
* modules/pam_access/pam_access.c (login_access): Return NOMATCH if
there was no match in the parsed file.
(pam_sm_authenticate): Add glob() call to go through the ACCESS_CONF_GLOB
subdirectory and call login_access() on the individual files matched.
* modules/pam_access/pam_access.8.xml: Document the addition.
* modules/pam_access/Makefile.am: Add ACCESS_CONF_GLOB definition.
Tomas Mraz [Mon, 17 Oct 2016 12:18:24 +0000 (14:18 +0200)]
pam_ftp: Properly use the first name from the supplied list
* modules/pam_ftp/pam_ftp.c (lookup): Return first user from the list
of anonymous users if user name matches.
(pam_sm_authenticate): Free the returned value allocated in lookup().
Tomas Mraz [Thu, 30 Jun 2016 12:29:40 +0000 (14:29 +0200)]
Unification and cleanup of syslog log levels.
* libpam/pam_handlers.c: Make memory allocation failures LOG_CRIT.
* libpam/pam_modutil_priv.c: Make memory allocation failures LOG_CRIT.
* modules/pam_echo/pam_echo.c: Make memory allocation failures LOG_CRIT.
* modules/pam_env/pam_env.c: Make memory allocation failures LOG_CRIT.
* modules/pam_exec/pam_exec.c: Make memory allocation failures LOG_CRIT.
* modules/pam_filter/pam_filter.c: Make all non-memory call errors LOG_ERR.
* modules/pam_group/pam_group.c: Make memory allocation failures LOG_CRIT.
* modules/pam_issue/pam_issue.c: Make memory allocation failures LOG_CRIT.
* modules/pam_lastlog/pam_lastlog.c: The lastlog file creation is syslogged
with LOG_NOTICE, memory allocation errors with LOG_CRIT, other errors
with LOG_ERR.
* modules/pam_limits/pam_limits.c: User login limit messages are syslogged
with LOG_NOTICE, stale utmp entry with LOG_INFO, non-memory errors with
LOG_ERR.
* modules/pam_listfile/pam_listfile.c: Rejection of user is syslogged
with LOG_NOTICE.
* modules/pam_namespace/pam_namespace.c: Make memory allocation failures
LOG_CRIT.
* modules/pam_nologin/pam_nologin.c: Make memory allocation failures
LOG_CRIT, other errors LOG_ERR.
* modules/pam_securetty/pam_securetty.c: Rejection of access is syslogged
with LOG_NOTICE, non-memory errors with LOG_ERR.
* modules/pam_selinux/pam_selinux.c: Make memory allocation failures LOG_CRIT.
* modules/pam_succeed_if/pam_succeed_if.c: Make all non-memory call errors
LOG_ERR.
* modules/pam_time/pam_time.c: Make memory allocation failures LOG_CRIT.
* modules/pam_timestamp/pam_timestamp.c: Make memory allocation failures
LOG_CRIT.
* modules/pam_unix/pam_unix_acct.c: Make all non-memory call errors LOG_ERR.
* modules/pam_unix/pam_unix_passwd.c: Make memory allocation failures LOG_CRIT,
other errors LOG_ERR.
* modules/pam_unix/pam_unix_sess.c: Make all non-memory call errors LOG_ERR.
* modules/pam_unix/passverify.c: Unknown user is syslogged with LOG_NOTICE.
* modules/pam_unix/support.c: Unknown user is syslogged with LOG_NOTICE and
max retries ignorance by application likewise.
* modules/pam_unix/unix_chkpwd.c: Make all non-memory call errors LOG_ERR.
* modules/pam_userdb/pam_userdb.c: Password authentication error is syslogged
with LOG_NOTICE.
* modules/pam_xauth/pam_xauth.c: Make memory allocation failures LOG_CRIT.
Dmitry V. Levin [Tue, 14 Jun 2016 23:03:13 +0000 (23:03 +0000)]
pam_timestamp: fix typo in strncmp usage
Before this fix, a typo in check_login_time resulted to ruser and
struct utmp.ut_user being compared by the first character only,
which in turn could lead to a too low timestamp value being assigned
to oldest_login, effectively causing bypass of check_login_time.
* modules/pam_timestamp/pam_timestamp.c (check_login_time): Fix typo
in strncmp usage.
Patch-by: Anton V. Boyarshinov <boyarsh@altlinux.org>
Tomas Mraz [Thu, 14 Apr 2016 15:48:03 +0000 (17:48 +0200)]
Project registered at Zanata (fedora.zanata.org) for translations.
* zanata.xml: Configuration file for zanata client.
* po/LINGUAS: Update languages as supported by Zanata.
* po/Linux-PAM.pot: Updated from sources.
* po/*.po: Updated from sources.
Tomas Mraz [Wed, 6 Apr 2016 11:52:21 +0000 (13:52 +0200)]
pam_get_authtok(): Add authtok_type support to current password prompt.
* libpam/pam_get_authtok.c (pam_get_authtok_internal): When changing password,
use different prompt for current password allowing for authtok_type to be
displayed to the user.
Thorsten Kukuk [Wed, 23 Mar 2016 10:16:55 +0000 (11:16 +0100)]
Remove YP dependencies from pam_access, they were never used
and such not needed.
* modules/pam_access/Makefile.am: Remove NIS_CFLAGS and NIS_LIBS
* modules/pam_access/pam_access.c: Remove yp_get_default_domain case,
it will never be used.
Tomas Mraz [Wed, 17 Feb 2016 13:57:15 +0000 (14:57 +0100)]
pam_env: Document the /etc/environment file.
* modules/pam_env/Makefile.am: Add the environment.5 soelim stub.
* modules/pam_env/pam_env.8.xml: Add environ(7) reference.
* modules/pam_env/pam_env.conf.5.xml: Add environment alias name.
Add a paragraph about /etc/environment. Add environ(7) reference.
Tomas Mraz [Wed, 17 Feb 2016 13:21:41 +0000 (14:21 +0100)]
pam_unix: Add no_pass_expiry option to ignore password expiration.
* modules/pam_unix/pam_unix.8.xml: Document the no_pass_expiry option.
* modules/pam_unix/pam_unix_acct.c (pam_sm_acct_mgmt): If no_pass_expiry
is on and return value data is not set to PAM_SUCCESS then ignore
PAM_NEW_AUTHTOK_REQD and PAM_AUTHTOK_EXPIRED returns.
* modules/pam_unix/pam_unix_auth.c (pam_sm_authenticate): Always set the
return value data.
(pam_sm_setcred): Test for likeauth option and use the return value data
only if set.
* modules/pam_unix/support.h: Add the no_pass_expiry option.
Thorsten Kukuk [Mon, 22 Jun 2015 12:53:01 +0000 (14:53 +0200)]
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
* libpam/Makefile.am: Bump version of libpam
* libpam_misc/Makefile.am: Bump version of libpam_misc
* po/*: Regenerate po files
Tomas Mraz [Tue, 7 Apr 2015 08:52:16 +0000 (10:52 +0200)]
Use crypt_r if available in pam_userdb and in pam_unix.
* modules/pam_unix/passverify.c (create_password_hash): Call crypt_r()
instead of crypt() if available.
* modules/pam_userdb/pam_userdb.c (user_lookup): Call crypt_r()
instead of crypt() if available.
Dmitry V. Levin [Tue, 6 Jan 2015 22:29:11 +0000 (22:29 +0000)]
build: raise gettext version requirement
Raise gettext requirement to the latest oldstable version 0.18.3.
This fixes the following automake warning:
configure.ac:581: warning: The 'AM_PROG_MKDIR_P' macro is deprecated, and its use is discouraged.
configure.ac:581: You should use the Autoconf-provided 'AC_PROG_MKDIR_P' macro instead,
configure.ac:581: and use '$(MKDIR_P)' instead of '$(mkdir_p)'in your Makefile.am files.
* configure.ac (AM_GNU_GETTEXT_VERSION): Raise from 0.15 to 0.18.3.
* po/Makevars: Update from gettext-0.18.3.
Dmitry V. Levin [Tue, 6 Jan 2015 22:58:27 +0000 (22:58 +0000)]
Remove unmodified GNU gettext files installed by autopoint
These files are part of GNU gettext; we have not modified them, they are
installed by autopoint which is called by autoreconf, so they had to be
removed from this repository along with ABOUT-NLS, config.rpath, and
mkinstalldirs files that were removed by commit
Linux-PAM-1_1_5-7-g542ec8b.
Luke Shumaker [Mon, 22 Dec 2014 20:46:43 +0000 (15:46 -0500)]
libpam: Only print "Password change aborted" when it's true.
pam_get_authtok() may be used any time that a password needs to be entered,
unlike pam_get_authtok_{no,}verify(), which may only be used when
changing a password; yet when the user aborts, it prints "Password change
aborted." whether or not that was the operation being performed.
This bug was non-obvious because none of the modules distributed with
Linux-PAM use it for anything but changing passwords; pam_unix has its
own utility function that it uses instead. As an example, the
nss-pam-ldapd package uses it in pam_sm_authenticate().
libpam/pam_get_authtok.c (pam_get_authtok_internal): check that the
password is trying to be changed before printing a message about the
password change being aborted.
Dmitry V. Levin [Tue, 9 Dec 2014 21:47:40 +0000 (21:47 +0000)]
build: extend cross compiling check to cover CPPFLAGS (ticket #21)
Use BUILD_CPPFLAGS variable to override CPPFLAGS where necessary in
case of cross compiling, in addition to CC_FOR_BUILD, BUILD_CFLAGS,
and BUILD_LDFLAGS variables introduced earlier to override CC,
CFLAGS, and LDFLAGS, respectively.
* configure.in (BUILD_CPPFLAGS): Define.
* doc/specs/Makefile.am (CPPFLAGS): Define to @BUILD_CPPFLAGS@.
Tomas Mraz [Fri, 17 Oct 2014 06:34:24 +0000 (08:34 +0200)]
pam_succeed_if: Use long long type for numeric values
The currently used long with additional conversion to int is
too small for uids and gids.
modules/pam_succeed_if/pam_succeed_if.c (evaluate_num): Replace
strtol() with strtoll() and int with long long in the parameters
of comparison functions.
Tomas Mraz [Fri, 5 Sep 2014 07:09:37 +0000 (09:09 +0200)]
Add grantor field to audit records of libpam.
The grantor field gives audit trail of PAM modules which granted access
for successful return from libpam calls. In case of failed return
the grantor field is set to '?'.
libpam/pam_account.c (pam_acct_mgmt): Remove _pam_auditlog() call.
libpam/pam_auth.c (pam_authenticate, pam_setcred): Likewise.
libpam/pam_password.c (pam_chauthtok): Likewise.
libpam/pam_session.c (pam_open_session, pam_close_session): Likewise.
libpam/pam_audit.c (_pam_audit_writelog): Add grantors parameter,
add grantor= field to the message if grantors is set.
(_pam_list_grantors): New function creating the string with grantors list.
(_pam_auditlog): Add struct handler pointer parameter, call _pam_list_grantors()
to list the grantors from the handler list.
(_pam_audit_end): Add NULL handler parameter to _pam_auditlog() call.
(pam_modutil_audit_write): Add NULL grantors parameter to _pam_audit_writelog().
libpam/pam_dispatch.c (_pam_dispatch_aux): Set h->grantor where appropriate.
(_pam_clear_grantors): New function to clear grantor field of handler.
(_pam_dispatch): Call _pam_clear_grantors() before executing the stack.
Call _pam_auditlog() when appropriate.
libpam/pam_handlers.c (extract_modulename): Do not allow empty module name
or just "?" to avoid confusing audit trail.
(_pam_add_handler): Test for NULL return from extract_modulename().
Clear grantor field of handler.
libpam/pam_private.h: Add grantor field to struct handler, add handler pointer
parameter to _pam_auditlog().
Tomas Mraz [Mon, 21 Jul 2014 14:31:38 +0000 (16:31 +0200)]
Make pam_pwhistory and pam_unix tolerant of corrupted opasswd file.
* modules/pam_pwhistory/opasswd.c (parse_entry): Test for missing fields
in opasswd entry and return error.
* modules/pam_unix/passverify.c (save_old_password): Test for missing fields
in opasswd entry and skip it.
Dmitry V. Levin [Thu, 8 May 2014 23:36:58 +0000 (23:36 +0000)]
doc: fix install in case of out of tree build (ticket #31)
* doc/adg/Makefile.am (install-data-local, releasedocs): Fall back
to srcdir if documentation files haven't been found in builddir.
(releasedocs): Treat missing documentation files as an error.
* doc/mwg/Makefile.am: Likewise.
* doc/sag/Makefile.am: Likewise.
pam_timestamp uses values of PAM_RUSER and PAM_TTY as components of
the timestamp pathname it creates, so extra care should be taken to
avoid potential directory traversal issues.
* modules/pam_timestamp/pam_timestamp.c (check_tty): Treat
"." and ".." tty values as invalid.
(get_ruser): Treat "." and ".." ruser values, as well as any ruser
value containing '/', as invalid.
Dmitry V. Levin [Tue, 28 Jan 2014 15:01:24 +0000 (15:01 +0000)]
Change tarball name back to "Linux-PAM"
As a side effect of commit Linux-PAM-1_1_8-11-g3fa23ce, tarball name
changed accidentally from "Linux-PAM" to "linux-pam".
This change brings it back to "Linux-PAM".
Dmitry V. Levin [Fri, 24 Jan 2014 15:32:08 +0000 (15:32 +0000)]
Introduce pam_modutil_sanitize_helper_fds
This change introduces pam_modutil_sanitize_helper_fds - a new function
that redirects standard descriptors and closes all other descriptors.
pam_modutil_sanitize_helper_fds supports three types of input and output
redirection:
- PAM_MODUTIL_IGNORE_FD: do not redirect at all.
- PAM_MODUTIL_PIPE_FD: redirect to a pipe. For stdin, it is implemented
by creating a pipe, closing its write end, and redirecting stdin to
its read end. Likewise, for stdout/stderr it is implemented by
creating a pipe, closing its read end, and redirecting to its write
end. Unlike stdin redirection, stdout/stderr redirection to a pipe
has a side effect that a process writing to such descriptor should be
prepared to handle SIGPIPE appropriately.
- PAM_MODUTIL_NULL_FD: redirect to /dev/null. For stdin, it is
implemented via PAM_MODUTIL_PIPE_FD because there is no functional
difference. For stdout/stderr, it is classic redirection to
/dev/null.
PAM_MODUTIL_PIPE_FD is usually more suitable due to linux kernel
security restrictions, but when the helper process might be writing to
the corresponding descriptor and termination of the helper process by
SIGPIPE is not desirable, one should choose PAM_MODUTIL_NULL_FD.
* libpam/pam_modutil_sanitize.c: New file.
* libpam/Makefile.am (libpam_la_SOURCES): Add it.
* libpam/include/security/pam_modutil.h (pam_modutil_redirect_fd,
pam_modutil_sanitize_helper_fds): New declarations.
* libpam/libpam.map (LIBPAM_MODUTIL_1.1.9): New interface.
* modules/pam_exec/pam_exec.c (call_exec): Use
pam_modutil_sanitize_helper_fds.
* modules/pam_mkhomedir/pam_mkhomedir.c (create_homedir): Likewise.
* modules/pam_unix/pam_unix_acct.c (_unix_run_verify_binary): Likewise.
* modules/pam_unix/pam_unix_passwd.c (_unix_run_update_binary):
Likewise.
* modules/pam_unix/support.c (_unix_run_helper_binary): Likewise.
* modules/pam_xauth/pam_xauth.c (run_coprocess): Likewise.
* modules/pam_unix/support.h (MAX_FD_NO): Remove.
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