tyler.durden
/
openssh-portable
mirror of https://github.com/PowerShell/openssh-portable.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

expose $SSH_CONNECTION in the PAM environment 

This makes the connection 4-tuple available to PAM modules that
wish to use it in decision-making. bz#2741
This commit is contained in:
Damien Miller 2018-12-07 15:41:16 +11:00
parent a784fa8c7a
commit 8a22ffaa13
2 changed files with 17 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
auth-pam.c
View File

@ -673,6 +673,7 @@ sshpam_init(Authctxt *authctxt)
{
const char *pam_rhost, *pam_user, *user = authctxt->user;
const char **ptr_pam_user = &pam_user;
char *laddr, *conninfo;
struct ssh *ssh = active_state; /* XXX */
if (sshpam_handle != NULL) {
@ -702,6 +703,15 @@ sshpam_init(Authctxt *authctxt)
sshpam_handle = NULL;
return (-1);
}
laddr = get_local_ipaddr(packet_get_connection_in());
xasprintf(&conninfo, "SSH_CONNECTION=%.50s %d %.50s %d",
ssh_remote_ipaddr(ssh), ssh_remote_port(ssh),
laddr, ssh_local_port(ssh));
pam_putenv(sshpam_handle, conninfo);
free(laddr);
free(conninfo);
#ifdef PAM_TTY_KLUDGE
/*
* Some silly PAM modules (e.g. pam_time) require a TTY to operate.

11
session.c
View File

@ -1162,15 +1162,18 @@ do_setup_env(struct ssh *ssh, Session *s, const char *shell)
char **p;
/*
* Don't allow SSH_AUTH_INFO variables posted to PAM to leak
* back into the environment.
* Don't allow PAM-internal env vars to leak
* back into the session environment.
*/
#define PAM_ENV_BLACKLIST "SSH_AUTH_INFO*,SSH_CONNECTION*"
p = fetch_pam_child_environment();
copy_environment_blacklist(p, &env, &envsize, "SSH_AUTH_INFO*");
copy_environment_blacklist(p, &env, &envsize,
PAM_ENV_BLACKLIST);
free_pam_environment(p);
p = fetch_pam_environment();
copy_environment_blacklist(p, &env, &envsize, "SSH_AUTH_INFO*");
copy_environment_blacklist(p, &env, &envsize,
PAM_ENV_BLACKLIST);
free_pam_environment(p);
}
#endif /* USE_PAM */