Include the Debian version in our identification

This makes it easier to audit networks for versions patched against security
vulnerabilities.  It has little detrimental effect, as attackers will
generally just try attacks rather than bothering to scan for
vulnerable-looking version strings.  (However, see debian-banner.patch.)

Forwarded: not-needed
Last-Update: 2017-10-04

Patch-Name: package-versioning.patch

3 files changed, 8 insertions, 3 deletions

diff --git a/sshconnect.c b/sshconnect.c
index 158e8146f..b9418e277 100644
--- a/sshconnect.c
+++ b/sshconnect.c
@@ -609,7 +609,7 @@ send_client_banner(int connection_out, int minor1)
 {
         /* Send our own protocol version identification. */
         xasprintf(&client_version_string, "SSH-%d.%d-%.100s\r\n",
-            PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, SSH_VERSION);
+            PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, SSH_RELEASE);
         if (atomicio(vwrite, connection_out, client_version_string,
             strlen(client_version_string)) != strlen(client_version_string))
                 fatal("write: %.100s", strerror(errno));
diff --git a/sshd.c b/sshd.c
index 2bc6679e5..9481272fc 100644
--- a/sshd.c
+++ b/sshd.c
@@ -384,7 +384,7 @@ sshd_exchange_identification(struct ssh *ssh, int sock_in, int sock_out)
         char remote_version[256];       /* Must be at least as big as buf. */
 
         xasprintf(&server_version_string, "SSH-%d.%d-%.100s%s%s\r\n",
-            PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, SSH_VERSION,
+            PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, SSH_RELEASE,
             *options.version_addendum == '\0' ? "" : " ",
             options.version_addendum);
 
diff --git a/version.h b/version.h
index 422dfbc3a..5e1ce0426 100644
--- a/version.h
+++ b/version.h
@@ -3,4 +3,9 @@
 #define SSH_VERSION     "OpenSSH_7.9"
 
 #define SSH_PORTABLE    "p1"
-#define SSH_RELEASE     SSH_VERSION SSH_PORTABLE
+#define SSH_RELEASE_MINIMUM     SSH_VERSION SSH_PORTABLE
+#ifdef SSH_EXTRAVERSION
+#define SSH_RELEASE     SSH_RELEASE_MINIMUM " " SSH_EXTRAVERSION
+#else
+#define SSH_RELEASE     SSH_RELEASE_MINIMUM
+#endif