Fix CVE-2018-20685: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20685 Patch copied from upstream source repository: https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2 From 6010c0303a422a9c5fa8860c061bf7105eb7f8b2 Mon Sep 17 00:00:00 2001 From: "djm@openbsd.org" Date: Fri, 16 Nov 2018 03:03:10 +0000 Subject: [PATCH] upstream: disallow empty incoming filename or ones that refer to the current directory; based on report/patch from Harry Sintonen OpenBSD-Commit-ID: f27651b30eaee2df49540ab68d030865c04f6de9 --- scp.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/scp.c b/scp.c index 60682c68..4f3fdcd3 100644 --- a/scp.c +++ b/scp.c #@@ -1,4 +1,4 @@ #-/* $OpenBSD: scp.c,v 1.197 2018/06/01 04:31:48 dtucker Exp $ */ #+/* $OpenBSD: scp.c,v 1.198 2018/11/16 03:03:10 djm Exp $ */ # /* # * scp - secure remote copy. This is basically patched BSD rcp which # * uses ssh to do the data transfer (instead of using rcmd). @@ -1106,7 +1106,8 @@ sink(int argc, char **argv) SCREWUP("size out of range"); size = (off_t)ull; - if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { + if (*cp == '\0' || strchr(cp, '/') != NULL || + strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) { run_err("error: unexpected filename: %s", cp); exit(1); } -- 2.20.1