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Version 1.98
============ Fixed some possible crashes and minor issues: * Under some conditions, there is a double-free bug in pam_ssh. The data of the "ssh_agent_env_agent" pam_handle_t's item may have been free'd without being nullified, which trigger a bug on the cleanup phase. (ticket #13 double-free bug with pam_ssh-1.97) * Before executing ssh-agent, pam_ssh restores root privileges with openpam_restore_cred, then uses only setuid to adjust privileges. Thus ssh-agent runs with gid 0. (ticket #12 pam_ssh doesn't set gid/groups before executing ssh-agent) * Clear signal mask before executing ssh-agent as pam_ssh code can be called from kdm with blocked TERM signal which would be inherited by ssh-agent * fixed crash caused by EOF password (ticket 14 pam_ssh segfaults on abort with empty password) Version 1.97 ============ SECURITY FIX: pam_ssh used a certain prompt if a user found to exist to ask for the SSH passphrase explicitely depending on whether the username was valid or invalid, which made it easier for remote attackers to enumerate usernames. (CVE-2009-1273) ********************************************************************** * The pam_ssh maintained on Novell's DeveloperNet got merged back * * to SourceForge with Version 1.96 and syncs both up to the same * * level. The DeveloperNet version isn't going to maintained further * * http://developer.novell.com/wiki/index.php/Pam_ssh * ********************************************************************** Version 1.96 (Novell DeveloperNet) ============ SECURITY FIX: The allow_blank_passphrase option was defeatable simply by entering a random but non-blank passphrase. Thanks to Rob Henderson for the report. Version 1.95 (Novell DeveloperNet) ============ Bugfix release to avoid double-free and and a null-pointer dereference issues. Version 1.94 (Novell DeveloperNet) ============ Improved logging and bugfix release with improved recovery after system crashes. Version 1.93 (Novell DeveloperNet) ============ The option to allow blank passphrases is now 'nullok' while the old option is still available but deprecated. The debug option is now really supported as documented. We didn't start the ssh-agent if the close_session module wasn't called correctly but the ssh-agent was killed (e.g. system crashes). That should be solved in almost all cases now. Version 1.92 (Novell DeveloperNet) ============ The module is usable now for session use only if wanted. It starts an ssh-agent without adding keys to it in that case. Version 1.92 (SourceForge) ============ SECURITY FIX: The allow_blank_passphrase option was defeatable simply by entering a random but non-blank passphrase. Thanks to Rob Henderson for the report. Version 1.91 ============ Don't allow blank passphrases by default. Add option allow_blank_passphrase to re-enable them. Thanks to red0x for the suggestion. Version 1.9 =========== Code cleanup release. Updated OpenSSH compatibility code to 3.7.1p2. Updated for newer Autoconf and Automake. Plus we use Autoheader now. Version 1.8 =========== This version is more portable about the way it juggles user IDs when starting the agent. As a result, it works on Linux systems. Also, it tries to run as the user rather than root as much as possible. Other portability changes were made--pam_ssh should now work on Mac OS X systems. Version 1.7 =========== Mark R V Murray of the FreeBSD project wrote a manual page, which we now include in the distribution. We now use Automake, Autoconf, and Libtool. I think a guy named Trey donated most of the Autoconf logic, which I probably ended up marring beyond recognition. Trey, if you're out there, drop me another note so I can give you proper credit. In this version we fixed a bunch of bugs and added support for OpenPAM and pam_std_option(), all thanks to FreeBSD. The OpenSSH code has been updated to 3.4p1. Version 1.6 =========== Only one agent is started per user per host. Thanks to <hmh@debian.org> for this idea. Each agent has an associated file with environment data (.ssh/agent-<hostname>). When a concurrent session is started, the session phase need only pass this environment data to the application rather than starting a new agent and adding the keys. A filename (.ssh/agent-<host>-<tty> or .ssh/agent-<host>-<display>) is hard linked to this environment file for each session to keep a reference count of the number of sessions using the agent. Only when the count drops to zero is the agent killed. Added keyfiles option to specify which key files to use for authentication. Only these keys will be given to the agent in the session phase. Updated OpenSSH code to version 2.9p2. |