From 65d62b5f4ffcb481994f6865d0e03d0e9ad58b2b Mon Sep 17 00:00:00 2001 From: Martin Schiller Date: Wed, 22 Nov 2017 13:39:51 +0100 Subject: [PATCH 1/1] dropbear: disable MD5 HMAC and switch to sha1 fingerprints As MD5 is known weak for many years and more and more penetration test tools complain about enabled MD5 HMAC I think it's time to drop it. By disabling the MD5 HMAC support dropbear will also automatically use SHA1 for fingerprints. This shouldn't be a problem too. Signed-off-by: Martin Schiller --- package/network/services/dropbear/Makefile | 2 +- .../services/dropbear/patches/120-openwrt_options.patch | 6 ++++-- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/package/network/services/dropbear/Makefile b/package/network/services/dropbear/Makefile index 133fa4ebb4..21ac09f724 100644 --- a/package/network/services/dropbear/Makefile +++ b/package/network/services/dropbear/Makefile @@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk PKG_NAME:=dropbear PKG_VERSION:=2017.75 -PKG_RELEASE:=4 +PKG_RELEASE:=5 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2 PKG_SOURCE_URL:= \ diff --git a/package/network/services/dropbear/patches/120-openwrt_options.patch b/package/network/services/dropbear/patches/120-openwrt_options.patch index b49a95ce93..7f47a74304 100644 --- a/package/network/services/dropbear/patches/120-openwrt_options.patch +++ b/package/network/services/dropbear/patches/120-openwrt_options.patch @@ -39,7 +39,7 @@ /* Enable "Counter Mode" for ciphers. This is more secure than normal * CBC mode against certain attacks. It is recommended for security -@@ -131,9 +131,9 @@ If you test it please contact the Dropbe +@@ -131,10 +131,10 @@ If you test it please contact the Dropbe * If you disable MD5, Dropbear will fall back to SHA1 fingerprints, * which are not the standard form. */ #define DROPBEAR_SHA1_HMAC @@ -47,10 +47,12 @@ +/*#define DROPBEAR_SHA1_96_HMAC*/ #define DROPBEAR_SHA2_256_HMAC -#define DROPBEAR_SHA2_512_HMAC +-#define DROPBEAR_MD5_HMAC +/*#define DROPBEAR_SHA2_512_HMAC*/ - #define DROPBEAR_MD5_HMAC ++/*#define DROPBEAR_MD5_HMAC*/ /* You can also disable integrity. Don't bother disabling this if you're + * still using a cipher, it's relatively cheap. If you disable this it's dead @@ -146,7 +146,7 @@ If you test it please contact the Dropbe * Removing either of these won't save very much space. * SSH2 RFC Draft requires dss, recommends rsa */ -- 2.30.2