linux-pam/NEWS

Linux-PAM NEWS -- history of user-visible changes.

Release 1.6.0
* Added support of configuration files with arbitrarily long lines.
* build: fixed build outside of the source tree.
* libpam: added use of getrandom(2) as a source of randomness if available.
* libpam: fixed calculation of fail delay with very long delays.
* libpam: fixed potential infinite recursion with includes.
* libpam: implemented string to number conversions validation when parsing
  controls in configuration.
* pam_access: added quiet_log option.
* pam_access: fixed truncation of very long group names.
* pam_canonicalize_user: new module to canonicalize user name.
* pam_echo: fixed file handling to prevent overflows and short reads.
* pam_env: added support of '\' character in environment variable values.
* pam_exec: allowed expose_authtok for password PAM_TYPE.
* pam_exec: fixed stack overflow with binary output of programs.
* pam_faildelay: implemented parameter ranges validation.
* pam_listfile: changed to treat \r and \n exactly the same in configuration.
* pam_mkhomedir: hardened directory creation against timing attacks.
  Please note that using *at functions leads to more open file handles
  during creation.
* pam_namespace: fixed potential local DoS (CVE-2024-22365).
* pam_nologin: fixed file handling to prevent short reads.
* pam_pwhistory: helper binary is now built only if SELinux support is enabled.
* pam_pwhistory: implemented reliable usernames handling when remembering
  passwords.
* pam_shells: changed to allow shell entries with absolute paths only.
* pam_succeed_if: fixed treating empty strings as numerical value 0.
* pam_unix: added support of disabled password aging.
* pam_unix: synchronized password aging with shadow.
* pam_unix: implemented string to number conversions validation.
* pam_unix: fixed truncation of very long user names.
* pam_unix: corrected rounds retrieval for configured encryption method.
* pam_unix: implemented reliable usernames handling when remembering passwords.
* pam_unix: changed to always run the helper to obtain shadow password entries.
* pam_unix: unix_update helper binary is now built only if SELinux support
  is enabled.
* pam_unix: added audit support to unix_update helper.
* pam_userdb: added gdbm support.
* Multiple minor bug fixes, portability fixes, documentation improvements,
  and translation updates.

Release 1.5.3
* configure: added options to configure stylesheets.
* configure: added --enable-logind option to use logind instead of utmp
  in pam_issue and pam_timestamp.
* pam_modutil_getlogin: changed to use getlogin() from libc instead of parsing utmp.
* Added libeconf support to pam_env and pam_shells.
* Added vendor directory support to pam_access, pam_env, pam_group, pam_faillock,
  pam_limits, pam_namespace, pam_pwhistory, pam_sepermit, pam_shells, and pam_time.
* pam_limits: changed to not fail on missing config files.
* pam_pwhistory: added conf= option to specify config file location.
* pam_pwhistory: added file= option to specify password history file location.
* pam_shells: added shells.d support when libeconf and vendordir are enabled.
* Deprecated pam_lastlog: this module is no longer built by default because
  it uses utmp, wtmp, btmp and lastlog, but none of them are Y2038 safe,
  even on 64bit architectures.
  pam_lastlog will be removed in one of the next releases, consider using
  pam_lastlog2 (from https://github.com/thkukuk/lastlog2) and/or
  pam_wtmpdb (from https://github.com/thkukuk/wtmpdb) instead.
* Deprecated _pam_overwrite(), _pam_overwrite_n(), and _pam_drop_reply() macros
  provided by _pam_macros.h; the memory override performed by these macros can
  be optimized out by the compiler and therefore can no longer be relied upon.
* Multiple minor bug fixes, portability fixes, documentation improvements,
  and translation updates.

Release 1.5.2
* pam_exec: implemented quiet_log option.
* pam_mkhomedir: added support of HOME_MODE and UMASK from /etc/login.defs.
* pam_timestamp: changed hmac algorithm to call openssl instead of the bundled
                 sha1 implementation if selected, added option to select
                 the hash algorithm to use with HMAC.
* Added pkgconfig files for provided libraries.
* Added --with-systemdunitdir configure option to specify systemd unit
  directory.
* Added --with-misc-conv-bufsize configure option to specify the buffer size
  in libpam_misc's misc_conv() function, raised the default value for this
  parameter from 512 to 4096.
* Multiple minor bug fixes, portability fixes, documentation improvements,
  and translation updates.

Release 1.5.1
* pam_unix: fixed CVE-2020-27780 - authentication bypass when a user
            doesn't exist and root password is blank
* pam_faillock: added nodelay option to not set pam_fail_delay
* pam_wheel: use pam_modutil_user_in_group to check for the group membership
             with getgrouplist where it is available

Release 1.5.0
* Multiple minor bug fixes, portability fixes, and documentation improvements.
* Extended libpam API with pam_modutil_check_user_in_passwd function.
* configure: added --disable-unix option to disable build of pam_unix module.
* pam_faillock: changed /run/faillock/$USER permissions from 0600 to 0660.
* pam_limits: added support for nonewprivs item.
* pam_motd: read motd files with target user credentials skipping unreadable ones.
* pam_pwhistory: added a SELinux helper executable.
* pam_unix, pam_usertype: implemented avoidance of certain timing attacks.
* pam_wheel: implemented PAM_RUSER fallback for the case when getlogin fails.
* Removed deprecated pam_cracklib module, use pam_passwdqc (from passwdqc project)
  or pam_pwquality (from libpwquality project) instead.
* Removed deprecated pam_tally and pam_tally2 modules, use pam_faillock instead.
* pam_env: Reading of the user environment is deprecated and will be removed
	   at some point in the future.
* libpam: pam_modutil_drop_priv() now correctly sets the target user's
          supplementary groups, allowing pam_motd to filter messages accordingly

Release 1.4.0
* Multiple minor bug fixes and documentation improvements
* Fixed grammar of messages printed via pam_prompt
* Added support for a vendor directory and libeconf
* configure: Added --enable-Werror option to enable -Werror build
* configure: Allowed disabling documentation through --disable-doc
* pam_get_authtok_verify: Avoid duplicate password verification
* pam_cracklib: Fixed parsing of options without arguments
* pam_env: Changed the default to not read the user .pam_environment file
* pam_exec: Require a user name to be specified before the command is executed
* pam_faillock: New module for locking after multiple auth failures
* pam_group, pam_time: Fixed logical error with multiple ! operators
* pam_keyinit: In pam_sm_setcred do the same as in pam_sm_open_session
* pam_lastlog: Do not log info about failed login if the session was opened
	       with PAM_SILENT flag
* pam_lastlog: Limit lastlog file use by LASTLOG_UID_MAX option in login.defs
* pam_lastlog: With 'unlimited' option prevent SIGXFSZ due to reduced 'fsize'
	       limit
* pam_mkhomedir: Fixed return value when the user is unknown
* pam_motd: Export MOTD_SHOWN=pam after showing MOTD
* pam_motd: Support multiple motd paths specified, with filename overrides
* pam_namespace: Added a systemd service, which creates the namespaced
		 instance parent directories during boot
* pam_namespace: Support for noexec, nosuid and nodev flags for tmpfs mounts
* pam_selinux: Check unknown object classes or permissions in current policy
* pam_selinux: Fall back to log to syslog if audit logging fails
* pam_setquota: New module to set or modify disk quotas on session start
* pam_shells: Recognize /bin/sh as the default shell
* pam_succeed_if: Fixed potential override of the default prompt
* pam_succeed_if: Support lists in group membership checks
* pam_time: Added conffile= option to specify an alternative configuration file
* pam_tty_audit: If kernel audit is disabled return PAM_IGNORE
* pam_umask: Added new 'nousergroups' module argument and allowed specifying
	     the default for usergroups at build-time
* pam_unix: Added 'nullresetok' option to allow resetting blank passwords
* pam_unix: Report unusable hashes found by checksalt to syslog
* pam_unix: Return PAM_AUTHINFO_UNAVAIL when shadow entry is unavailable
* pam_unix: Support for (gost-)yescrypt hashing methods
* pam_unix: Use bcrypt b-variant when it bcrypt is chosen
* pam_usertype: New module to tell if uid is in login.defs ranges
* Fixed and documented possible values returned by pam_get_user()
* Added new API call pam_start_confdir() for special applications that
  cannot use the system-default PAM configuration paths and need to
  explicitly specify another path
* Deprecated pam_cracklib: this module is no longer built by default and will
  be removed in the next release, use pam_passwdqc (from passwdqc project)
  or pam_pwquality (from libpwquality project) instead
* Deprecated pam_tally and pam_tally2: these modules are no longer built
  by default and will be removed in the next release, use pam_faillock instead

Release 1.3.1
* pam_motd: add support for a motd.d directory
* pam_umask: Fix documentation to align with order of loading umask
* pam_get_user.3: Fix missing word in documentation
* pam_tally2 --reset: avoid creating a missing tallylog file
* pam_mkhomedir: Allow creating parent of homedir under /
* access.conf.5: Add note about spaces around ':'
* pam.8: Workaround formatting problem
* pam_unix: Check return value of malloc used for setcred data
* pam_cracklib: Drop unused prompt macros
* pam_tty_audit: Support matching users by uid range
* pam_access: support parsing files in /etc/security/access.d/*.conf
* pam_localuser: Correct documentation
* pam_issue: Fix no prompting in parse escape codes mode
* Unification and cleanup of syslog log levels


Release 1.3.0
* Remove of static modules support
* pam_unix: pass_not_set was removed
* Lot of documentation fixes
* Use TI-RPC function calls if we build against libtirpc
* Add support for new, IPv6 enabled libnsl
* Lot of bug fixes
* Use fedora.zanata.org for translations


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
* pam_unix: add quiet option
* libpam: support alternative configuration files in /usr/lib/pam.d
          as fallback
* pam_env: add support for @{HOME} and @{SHELL}
* libpam: add grantor field to audit records
* libpam: Introduce pam_modutil_sanitize_helper_fds


Release 1.1.8
* pam_unix: bug fix for compiling with SELinux, fix crash at login time


Release 1.1.7
* Update translations
* pam_exec: add stdout and type= options
* pam_tty_audit: add options to control logging of passwords
* pam_unix: Read defaults from /etc/login.defs
* pam_userdb: Allow modern password hashes
* pam_selinux/pam_tally2: Add tty and rhost to audit data
* Lot of docu and code fixes


Release 1.1.6
* Update translations
* pam_cracklib: Add more checks for weak passwords
* pam_lastlog: Never lock out root
* Lot of bug fixes and smaller enhancements


Release 1.1.5
* pam_env: Fix CVE-2011-3148 and CVE-2011-3149
* pam_access: Add hostname resolution cache
* Documentation: Improvements/fixes


Release 1.1.4

* Add vietnamese translation
* pam_namespace: Add new functionality
* pam_securetty: Honour console= kernel option, add noconsole option
* pam_limits: Add %group syntax, drop change_uid option, add set_all option
* Lot of small bug fixes
* Lot of compiler warnings fixed
* Add support for libtirpc


Release 1.1.3

* pam_namespace: Clean environment for child processes (CVE-2010-3853)
* libpam: New interface to drop/regain privileges
* Drop root privileges in pam_env, pam_mail and pam_xauth before
  accessing user files (CVE-2010-3430, CVE-2010-3431)
* pam_unix: Add minlen option, change default from 6 to 0
* Documentation improvements
* Lot of small bug fixes

Release 1.1.2

* pam_unix: Add minlen= option
* pam_group: Add support for UNIX groups beside netgroups
* pam_tally: Document that it is deprecated
* pam_rootok: Add support for chauthtok and acct_mgmt
* Update translations

Release 1.1.1

* Update translations
* pam_access: Revert netgroup match to original behavior, add new
  syntax for adding the local hostname to netgroup match
* libpam: Add new functions pam_get_authtok_noverify() and
  pam_get_authtok_verify()
* Add sepermit.conf.5 manual page
* Lot of bug fixes

Release 1.1.0

* Update translations
* Documentation updates and fixes

Release 1.0.92

* Update translations
* pam_succeed_if: Use provided username
* pam_mkhomedir: Fix handling of options

Release 1.0.91

* Fixed CVE-2009-0579 (minimum days limit on password change is ignored).
* Fix libpam internal config/argument parser
* Add optional file locking to pam_tally2
* Update translations
* pam_access improvements
* Changes in the behavior of the password stack. Results of PRELIM_CHECK
  are not used for the final run.

Release 1.0.90

* Supply hostname of the machine to netgroup match call in pam_access
* Make pam_namespace to work safe on child directories of parent directories
  owned by users
* Redefine LOCAL keyword of pam_access configuration file
* Add support for try_first_pass and use_first_pass to pam_cracklib
* Print informative messages for rejected login and add silent and
  no_log_info options to pam_tally
* Add support for passing PAM_AUTHTOK to stdin of helpers from pam_exec
* New password quality tests in pam_cracklib
* New options for pam_lastlog to show last failed login attempt and
  to disable lastlog update
* New pam_pwhistory module to store last used passwords
* New pam_tally2 module similar to pam_tally with wordsize independent
  tally data format
* Make libpam not log missing module if its type is prepended with '-'
* New pam_timestamp module for authentication based on recent successful
  login.
* Add blowfish support to pam_unix.
* Add support for user specific environment file to pam_env.
* Add pam_get_authtok to libpam as Linux-PAM extension.
* Rename type option of pam_cracklib to authtok_type.

Release 1.0.3

* Small bug fix release


Release 1.0.2

* Regression fixed in pam_selinux
* Problem with big UIDs fixed in pam_loginuid


Release 1.0.1

* Regression fixed in pam_set_item()


Release 1.0.0

* Small bug fixes
* Translation updates


Release 0.99.10.0

* New substack directive in config file syntax.
* New module pam_tty_audit.so for enabling and disabling tty
  auditing.
* New PAM items PAM_XDISPLAY and PAM_XAUTHDATA.
* Auditing login denials based by origin (pam_access), time (pam_time),
  and number of sessions (pam_limits) to the Linux audit subsystem.
* Support sha256 and sha512 algorithms in pam_unix when they are supported
  by crypt().
* New pam_sepermit.so module for allowing/rejecting access based on
  SELinux mode.
* Improved functionality of pam_namespace.so module (method flags,
  namespace.d configuration directory, new options).
* Finally removed deprecated pam_rhosts_auth module.


Release 0.99.9.0

* misc_conv no longer blocks SIGINT; applications that don't want
  user-interruptable prompts should block SIGINT themselves
* Merge fixes from Debian
* Fix parser for pam_group and pam_time


Release 0.99.8.1

* Fix a regression in audit code introduced with last release
* Fix compiling with --disable-nls


Release 0.99.8.0

* Add translations for ar, ca, da, ru, sv and zu.
* Update hungarian translation.
* Add support for limits.d directory to pam_limits.
* Improve pam_namespace module tobe more useful
  for MLS, fixed crash with bad config files.
* Improve pam_selinux module to be more useful
  for MLS.
* Add minclass option to pam_cracklib
* Add new group syntax to pam_access


Release 0.99.7.1

* Security fix for pam_unix.so (CVE-2007-0003).


Release 0.99.7.0

* Add manual page for pam_unix.so.
* Add pam_faildelay module to set pam_fail_delay() value.
* Fix possible seg.fault in libpam/pam_set_data().
* Cleanup of configure options.
* Update hungarian translation, fix german translation.


Release 0.99.6.3

* pam_loginuid: New PAM module.
* pam_access, pam_succeed_if: Support passwd and session services.


Release 0.99.6.2

* pam_lastlog: Don't refuse login if lastlog file got lost.
* pam_cracklib: Fix a user triggerable crash.
* documentation: Regenerate with fixed docbook stylesheet.


Release 0.99.6.1

* Fix bootstrapping problems.
* Bug fixes: pam_keyinit, pam_umask


Release 0.99.6.0

* pam_namespace: Code cleanup, add init script to tar archive.
* pam_succeed_if: Add support for service match.
* Add xtests (to run after installation).
* Documentation: Convert sgml guides to XML, unify documentation
  for PAM functions and modules.


Release 0.99.5.0

* pam_tally: Fix support for large UIDs
* Fixed all problems found by Coverity
* Add support for Intel C Compiler
* Add manual page for pam_mkhomedir, pam_umask, pam_filter,
  pam_issue, pam_ftp, pam_group, pam_lastlog, pam_listfile,
  pam_localuser, pam_mail, pam_motd, pam_nologin, pam_permit,
  pam_rootok, pam_securetty, pam_shells, pam_userdb, pam_warn,
  pam_time, pam_limits, pam_debug, pam_tally
* The libpam memory debug code was removed
* pam_keyinit: New module to initialise kernel session keyring.
* pam_namespace: New module to configure private namespace for a session.
* pam_rhosts: New module which replaces pam_rhosts_auth, now IPv6 capable.
* pam_rhosts_auth: This module is now deprecated.


Release 0.99.4.0

* Add test suite
* Fix building of static variants of libpam, libpamc and libpam_misc
* pam_listfile: Add support for password and session management
* pam_exec: New PAM module to execute arbitrary commands
* Fix building of a static libpam including all PAM modules
* New/updated translations for: nl, pt, pl, fi, km, tr, uk, fr
* pam_access: Add network(address) / netmask and IPv6 support
* Add manual pages for pam_cracklib, pam_deny and pam_access
* pam_pwdb: This deprecated module was removed
* Manual pages: Major rewrite/cleanup


Release 0.99.3.0

* Fix NULL pointer checks in libpam.so
* pam_succeed_if, pam_group, pam_time: Support netgroup matching
* New translations for: nb, hu, fi, de, es, fr, it, ja, pt_BR, zh_CN, zh_TW
* Audit PAM calls if Linux Audit is available
* Compile upperLOWER and unix_chkpwd as PIE binaries


Release 0.99.2.1

* Fix install of PS, PDF, TXT and HTML files
* pam_mail: Update README
* Use %m consistent
* pam_modutil_getlogin: Fix parsing of PAM_TTY variable


Release 0.99.2.0

* Fix parsing of full path tty name in various modules
* pam_xauth: Look for xauth executable in multiple places
* pam_unix: Disable user check in unix_chkpwd only if real uid
  is 0 (CVE-2005-2977). Log failed password check attempt.
* pam_env: Support /etc/environment again, but don't treat it as
  error if it is missing.
* pam_userdb: Fix memory leak.


Release 0.99.1.0

* Use autoconf/automake/libtool
* Add gettext support
* Add translations for cs, de, es, fr, hu, it, ja, nb, pa, pt_BR,
  pt, zh_CN and zh_TW
* libpam: Remove pam_authenticate_secondary stub
* libpam: Add pam_prompt,pam_vprompt,pam_error,pam_verror,pam_info
  and pam_vinfo functions for use by modules as extension
* libpam: Add pam_syslog function for unified syslog messages from
  PAM modules
* libpam: Moved functions from pammodutil to libpam
* pam_umask: New module for setting umask from GECOS field, /etc/login.defs
  or /etc/default/login
* pam_echo: New PAM module for message output
* pam_userdb: Fix regression (crash when crypt param not specified)
* pam_limits: Fix regression from RLIMIT_NICE support (wrong limit
  values for other limits are applied)
* pam_access: Support for NULL tty - matches ALL and NONE keywords
* pam_lastlog: Enable log to wtmp by default.  Add "nowtmp" option
* pam_radius: This module was removed