Author: delphij
Date: Tue Jul 28 19:58:38 2015
New Revision: 285975
URL: https://svnweb.freebsd.org/changeset/base/285975
Log:
Fix multiple OpenSSH vulnerabilities.
Security: CVE-2014-2653
Security: CVE-2015-5600
Security: FreeBSD-SA-15:16.openssh
Modified:
head/crypto/openssh/auth2-chall.c
head/crypto/openssh/sshconnect.c
Modified: head/crypto/openssh/auth2-chall.c
==============================================================================
--- head/crypto/openssh/auth2-chall.c Tue Jul 28 19:58:36 2015
(r285974)
+++ head/crypto/openssh/auth2-chall.c Tue Jul 28 19:58:38 2015
(r285975)
@@ -82,6 +82,7 @@ struct KbdintAuthctxt
void *ctxt;
KbdintDevice *device;
u_int nreq;
+ u_int devices_done;
};
#ifdef USE_PAM
@@ -168,11 +169,15 @@ kbdint_next_device(Authctxt *authctxt, K
if (len == 0)
break;
for (i = 0; devices[i]; i++) {
- if (!auth2_method_allowed(authctxt,
+ if ((kbdintctxt->devices_done & (1 << i)) != 0 ||
+ !auth2_method_allowed(authctxt,
"keyboard-interactive", devices[i]->name))
continue;
- if (strncmp(kbdintctxt->devices, devices[i]->name, len)
== 0)
+ if (strncmp(kbdintctxt->devices, devices[i]->name,
+ len) == 0) {
kbdintctxt->device = devices[i];
+ kbdintctxt->devices_done |= 1 << i;
+ }
}
t = kbdintctxt->devices;
kbdintctxt->devices = t[len] ? xstrdup(t+len+1) : NULL;
Modified: head/crypto/openssh/sshconnect.c
==============================================================================
--- head/crypto/openssh/sshconnect.c Tue Jul 28 19:58:36 2015
(r285974)
+++ head/crypto/openssh/sshconnect.c Tue Jul 28 19:58:38 2015
(r285975)
@@ -1247,29 +1247,39 @@ verify_host_key(char *host, struct socka
{
int flags = 0;
char *fp;
+ Key *plain = NULL;
fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX);
debug("Server host key: %s %s", key_type(host_key), fp);
free(fp);
- /* XXX certs are not yet supported for DNS */
- if (!key_is_cert(host_key) && options.verify_host_key_dns &&
- verify_host_key_dns(host, hostaddr, host_key, &flags) == 0) {
- if (flags & DNS_VERIFY_FOUND) {
-
- if (options.verify_host_key_dns == 1 &&
- flags & DNS_VERIFY_MATCH &&
- flags & DNS_VERIFY_SECURE)
- return 0;
-
- if (flags & DNS_VERIFY_MATCH) {
- matching_host_key_dns = 1;
- } else {
- warn_changed_key(host_key);
- error("Update the SSHFP RR in DNS with the new "
- "host key to get rid of this message.");
+ if (options.verify_host_key_dns) {
+ /*
+ * XXX certs are not yet supported for DNS, so downgrade
+ * them and try the plain key.
+ */
+ plain = key_from_private(host_key);
+ if (key_is_cert(plain))
+ key_drop_cert(plain);
+ if (verify_host_key_dns(host, hostaddr, plain, &flags) == 0) {
+ if (flags & DNS_VERIFY_FOUND) {
+ if (options.verify_host_key_dns == 1 &&
+ flags & DNS_VERIFY_MATCH &&
+ flags & DNS_VERIFY_SECURE) {
+ key_free(plain);
+ return 0;
+ }
+ if (flags & DNS_VERIFY_MATCH) {
+ matching_host_key_dns = 1;
+ } else {
+ warn_changed_key(plain);
+ error("Update the SSHFP RR in DNS "
+ "with the new host key to get rid "
+ "of this message.");
+ }
}
}
+ key_free(plain);
}
return check_host_key(host, hostaddr, options.port, host_key, RDRW,
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