diff options
| author | Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk> | 2016-09-07 17:23:51 +0100 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2016-09-10 12:17:39 +0200 |
| commit | 96f0bbe91d2176284324c4d9b4839b6878148602 (patch) | |
| tree | 54d728e3a454fad91bed1892343a3eb19806cc69 | |
| parent | ca356887edbd509d15165009a2cc73991f76c399 (diff) | |
| download | upstream-96f0bbe91d2176284324c4d9b4839b6878148602.tar.gz upstream-96f0bbe91d2176284324c4d9b4839b6878148602.tar.bz2 upstream-96f0bbe91d2176284324c4d9b4839b6878148602.zip | |
dropbear: hide dropbear version
As security precaution and to limit the attack surface based on
the version reported by tools like nmap mask out the dropbear
version so the version is not visible anymore by snooping on the
wire. Version is still visible by 'dropbear -V'
Based on a patch by Hans Dedecker <dedeckeh@gmail.com>
Signed-off-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
Signed-off-by: Felix Fietkau <nbd@nbd.name> [remove trailing _]
| -rw-r--r-- | package/network/services/dropbear/Makefile | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/package/network/services/dropbear/Makefile b/package/network/services/dropbear/Makefile index 36bcb4ab7b..b80f4d5c81 100644 --- a/package/network/services/dropbear/Makefile +++ b/package/network/services/dropbear/Makefile @@ -105,6 +105,10 @@ define Build/Configure mv $(PKG_BUILD_DIR)/options.h.new $(PKG_BUILD_DIR)/options.h || exit 1; \ done + # remove protocol idented software version number + $(SED) 's,^#define LOCAL_IDENT .*$$$$,#define LOCAL_IDENT "SSH-2.0-dropbear",g' \ + $(PKG_BUILD_DIR)/sysoptions.h + # Enforce rebuild of svr-chansession.c rm -f $(PKG_BUILD_DIR)/svr-chansession.o endef |