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Fix OpenSSH multiple vulnerabilities by backporting three changes

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from OpenSSH-portable master.

Git revisions:	45b0eb752c94954a6de046bfaaf129e518ad4b5b
		5e75f5198769056089fb06c4d738ab0e5abc66f7
		d4697fe9a28dab7255c60433e4dd23cf7fce8a8b
Reviewed by:	des
Security:	FreeBSD-SA-15:22.openssh
This commit is contained in:
Xin LI 2015-08-25 20:48:37 +00:00
parent 8c8e848710
commit 1e415e2992
3 changed files with 7 additions and 6 deletions
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6
crypto/openssh/monitor.c
View File

@ -1027,9 +1027,7 @@ extern KbdintDevice sshpam_device;
int
mm_answer_pam_init_ctx(int sock, Buffer *m)
{
debug3("%s", __func__);
authctxt->user = buffer_get_string(m, NULL);
sshpam_ctxt = (sshpam_device.init_ctx)(authctxt);
sshpam_authok = NULL;
buffer_clear(m);
@ -1111,14 +1109,16 @@ mm_answer_pam_respond(int sock, Buffer *m)
int
mm_answer_pam_free_ctx(int sock, Buffer *m)
{
int r = sshpam_authok != NULL && sshpam_authok == sshpam_ctxt;
debug3("%s", __func__);
(sshpam_device.free_ctx)(sshpam_ctxt);
sshpam_ctxt = sshpam_authok = NULL;
buffer_clear(m);
mm_request_send(sock, MONITOR_ANS_PAM_FREE_CTX, m);
auth_method = "keyboard-interactive";
auth_submethod = "pam";
return (sshpam_authok == sshpam_ctxt);
return r;
}
#endif

1
crypto/openssh/monitor_wrap.c
View File

@ -820,7 +820,6 @@ mm_sshpam_init_ctx(Authctxt *authctxt)
debug3("%s", __func__);
buffer_init(&m);
buffer_put_cstring(&m, authctxt->user);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);

6
crypto/openssh/mux.c
View File

@ -635,7 +635,8 @@ process_mux_open_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r)
u_int lport, cport;
int i, ret = 0, freefwd = 1;
fwd.listen_host = fwd.connect_host = NULL;
memset(&fwd, 0, sizeof(fwd));
if (buffer_get_int_ret(&ftype, m) != 0 ||
(fwd.listen_host = buffer_get_string_ret(m, NULL)) == NULL ||
buffer_get_int_ret(&lport, m) != 0 ||
@ -785,7 +786,8 @@ process_mux_close_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r)
int i, listen_port, ret = 0;
u_int lport, cport;
fwd.listen_host = fwd.connect_host = NULL;
memset(&fwd, 0, sizeof(fwd));
if (buffer_get_int_ret(&ftype, m) != 0 ||
(fwd.listen_host = buffer_get_string_ret(m, NULL)) == NULL ||
buffer_get_int_ret(&lport, m) != 0 ||