From: Kevin Darbyshire-Bryant Date: Thu, 31 Aug 2017 12:32:39 +0000 (+0200) Subject: dropbear: hide dropbear version X-Git-Url: http://git.archive.openwrt.org/?a=commitdiff_plain;h=ab78bc85cc098d7d33eec4f0c0cc6a1a518d053b;p=15.05%2Fopenwrt.git 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 Signed-off-by: Kevin Darbyshire-Bryant Signed-off-by: Felix Fietkau --- diff --git a/package/network/services/dropbear/Makefile b/package/network/services/dropbear/Makefile index 8c9b45f486..7caf0c7083 100644 --- a/package/network/services/dropbear/Makefile +++ b/package/network/services/dropbear/Makefile @@ -104,6 +104,10 @@ 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