diff options
Diffstat (limited to '')
| -rw-r--r-- | debian/patches/debian-banner.patch | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/debian/patches/debian-banner.patch b/debian/patches/debian-banner.patch new file mode 100644 index 0000000..7963b03 --- /dev/null +++ b/debian/patches/debian-banner.patch @@ -0,0 +1,111 @@ +From a18385c6866da4d69f46b64626ae5d60b4cf4a66 Mon Sep 17 00:00:00 2001 +From: Kees Cook <kees@debian.org> +Date: Sun, 9 Feb 2014 16:10:06 +0000 +Subject: Add DebianBanner server configuration option + +Setting this to "no" causes sshd to omit the Debian revision from its +initial protocol handshake, for those scared by package-versioning.patch. + +Bug-Debian: http://bugs.debian.org/562048 +Forwarded: not-needed +Last-Update: 2018-10-19 + +Patch-Name: debian-banner.patch +--- + servconf.c | 9 +++++++++ + servconf.h | 2 ++ + sshd.c | 3 ++- + sshd_config.5 | 5 +++++ + 4 files changed, 18 insertions(+), 1 deletion(-) + +diff --git a/servconf.c b/servconf.c +index 6caf1db38..c5dd617ef 100644 +--- a/servconf.c ++++ b/servconf.c +@@ -182,6 +182,7 @@ initialize_server_options(ServerOptions *options) + options->fingerprint_hash = -1; + options->disable_forwarding = -1; + options->expose_userauth_info = -1; ++ options->debian_banner = -1; + } + + /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */ +@@ -417,6 +418,8 @@ fill_default_server_options(ServerOptions *options) + options->disable_forwarding = 0; + if (options->expose_userauth_info == -1) + options->expose_userauth_info = 0; ++ if (options->debian_banner == -1) ++ options->debian_banner = 1; + + assemble_algorithms(options); + +@@ -504,6 +507,7 @@ typedef enum { + sStreamLocalBindMask, sStreamLocalBindUnlink, + sAllowStreamLocalForwarding, sFingerprintHash, sDisableForwarding, + sExposeAuthInfo, sRDomain, ++ sDebianBanner, + sDeprecated, sIgnore, sUnsupported + } ServerOpCodes; + +@@ -661,6 +665,7 @@ static struct { + { "exposeauthinfo", sExposeAuthInfo, SSHCFG_ALL }, + { "rdomain", sRDomain, SSHCFG_ALL }, + { "casignaturealgorithms", sCASignatureAlgorithms, SSHCFG_ALL }, ++ { "debianbanner", sDebianBanner, SSHCFG_GLOBAL }, + { NULL, sBadOption, 0 } + }; + +@@ -2173,6 +2178,10 @@ process_server_config_line(ServerOptions *options, char *line, + *charptr = xstrdup(arg); + break; + ++ case sDebianBanner: ++ intptr = &options->debian_banner; ++ goto parse_flag; ++ + case sDeprecated: + case sIgnore: + case sUnsupported: +diff --git a/servconf.h b/servconf.h +index 3b76da816..4e3c54042 100644 +--- a/servconf.h ++++ b/servconf.h +@@ -212,6 +212,8 @@ typedef struct { + int fingerprint_hash; + int expose_userauth_info; + u_int64_t timing_secret; ++ ++ int debian_banner; + } ServerOptions; + + /* Information about the incoming connection as used by Match */ +diff --git a/sshd.c b/sshd.c +index 9481272fc..d7e77d343 100644 +--- a/sshd.c ++++ b/sshd.c +@@ -384,7 +384,8 @@ 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_RELEASE, ++ PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, ++ options.debian_banner ? SSH_RELEASE : SSH_RELEASE_MINIMUM, + *options.version_addendum == '\0' ? "" : " ", + options.version_addendum); + +diff --git a/sshd_config.5 b/sshd_config.5 +index e7e55dd71..37e6be38f 100644 +--- a/sshd_config.5 ++++ b/sshd_config.5 +@@ -543,6 +543,11 @@ or + .Cm no . + The default is + .Cm yes . ++.It Cm DebianBanner ++Specifies whether the distribution-specified extra version suffix is ++included during initial protocol handshake. ++The default is ++.Cm yes . + .It Cm DenyGroups + This keyword can be followed by a list of group name patterns, separated + by spaces. |