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wolfssh
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Code Issues Releases Wiki Activity

chroot and reduce permissions after forkpty

pull/441/head
JacobBarthelmeh 2022-08-31 10:34:13 -07:00
parent 0ef7ca2145
commit e1f72a00e1
1 changed files with 31 additions and 21 deletions
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52
apps/wolfsshd/wolfsshd.c
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@ -434,27 +434,6 @@ static int SHELL_Subsystem(WOLFSSHD_CONNECTION* conn, WOLFSSH* ssh,
}
ChildRunning = 1;
if (SetupChroot(usrConf) < 0) {
wolfSSH_Log(WS_LOG_ERROR, "[SSHD] Error setting chroot");
if (wolfSSHD_AuthReducePermissions(conn->auth) != WS_SUCCESS) {
/* stop everything if not able to reduce permissions level */
exit(1);
}
return WS_FATAL_ERROR;
}
if (wolfSSHD_AuthReducePermissionsUser(conn->auth, pPasswd->pw_uid,
pPasswd->pw_gid) != WS_SUCCESS) {
wolfSSH_Log(WS_LOG_ERROR, "[SSHD] Error setting user ID");
if (wolfSSHD_AuthReducePermissions(conn->auth) != WS_SUCCESS) {
/* stop everything if not able to reduce permissions level */
exit(1);
}
return WS_FATAL_ERROR;
}
childPid = forkpty(&childFd, NULL, NULL, NULL);
if (childPid < 0) {
/* forkpty failed, so return */
@ -471,6 +450,27 @@ static int SHELL_Subsystem(WOLFSSHD_CONNECTION* conn, WOLFSSH* ssh,
signal(SIGINT, SIG_DFL);
signal(SIGCHLD, SIG_DFL);
if (SetupChroot(usrConf) < 0) {
wolfSSH_Log(WS_LOG_ERROR, "[SSHD] Error setting chroot");
if (wolfSSHD_AuthReducePermissions(conn->auth) != WS_SUCCESS) {
/* stop everything if not able to reduce permissions level */
exit(1);
}
return WS_FATAL_ERROR;
}
if (wolfSSHD_AuthReducePermissionsUser(conn->auth, pPasswd->pw_uid,
pPasswd->pw_gid) != WS_SUCCESS) {
wolfSSH_Log(WS_LOG_ERROR, "[SSHD] Error setting user ID");
if (wolfSSHD_AuthReducePermissions(conn->auth) != WS_SUCCESS) {
/* stop everything if not able to reduce permissions level */
exit(1);
}
return WS_FATAL_ERROR;
}
setenv("HOME", pPasswd->pw_dir, 1);
setenv("LOGNAME", pPasswd->pw_name, 1);
rc = chdir(pPasswd->pw_dir);
@ -503,6 +503,16 @@ static int SHELL_Subsystem(WOLFSSHD_CONNECTION* conn, WOLFSSH* ssh,
exit(0); /* exit child process and close down SSH connection */
}
if (wolfSSHD_AuthReducePermissionsUser(conn->auth, pPasswd->pw_uid,
pPasswd->pw_gid) != WS_SUCCESS) {
wolfSSH_Log(WS_LOG_ERROR, "[SSHD] Error setting user ID");
if (wolfSSHD_AuthReducePermissions(conn->auth) != WS_SUCCESS) {
/* stop everything if not able to reduce permissions level */
exit(1);
}
return WS_FATAL_ERROR;
}
sshFd = wolfSSH_get_fd(ssh);
struct termios tios;