From aae80e71b6ce75bdf73cc9b84ec96c92ed13aa58 Mon Sep 17 00:00:00 2001 From: Baruch Siach Date: Tue, 15 Nov 2016 08:34:18 +0200 Subject: [PATCH] openssh: add upstream security fix Fixes CVE-2016-8858: Memory exhaustion, up to 128MB, of unauthenticated peer. Signed-off-by: Baruch Siach Signed-off-by: Thomas Petazzoni --- package/openssh/0003-fix-CVE-2016-8858.patch | 31 ++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 package/openssh/0003-fix-CVE-2016-8858.patch diff --git a/package/openssh/0003-fix-CVE-2016-8858.patch b/package/openssh/0003-fix-CVE-2016-8858.patch new file mode 100644 index 0000000000..4ba1cfdc01 --- /dev/null +++ b/package/openssh/0003-fix-CVE-2016-8858.patch @@ -0,0 +1,31 @@ +From ec165c392ca54317dbe3064a8c200de6531e89ad Mon Sep 17 00:00:00 2001 +From: "markus@openbsd.org" +Date: Mon, 10 Oct 2016 19:28:48 +0000 +Subject: [PATCH] upstream commit + +Unregister the KEXINIT handler after message has been +received. Otherwise an unauthenticated peer can repeat the KEXINIT and cause +allocation of up to 128MB -- until the connection is closed. Reported by +shilei-c at 360.cn + +Upstream-ID: 43649ae12a27ef94290db16d1a98294588b75c05 + +Signed-off-by: Baruch Siach +--- +Patch status: upstream + + kex.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +diff --git a/kex.c b/kex.c +index 3f97f8c..6a94bc5 100644 +--- a/kex.c ++++ b/kex.c +@@ -481,6 +481,7 @@ kex_input_kexinit(int type, u_int32_t seq, void *ctxt) + if (kex == NULL) + return SSH_ERR_INVALID_ARGUMENT; + ++ ssh_dispatch_set(ssh, SSH2_MSG_KEXINIT, NULL); + ptr = sshpkt_ptr(ssh, &dlen); + if ((r = sshbuf_put(kex->peer, ptr, dlen)) != 0) + return r; -- 2.30.2