openssh: fix CVE-2025-61985

ssh in OpenSSH before 10.1 allows the '\0' character in an ssh:// URI, potentially
leading to code execution when a ProxyCommand is used.

(From OE-Core rev: 5170bd2f8a63bcc310667a327ea2ab96c783c4f6)

Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-connectivity/openssh/openssh/CVE-2025-61985.patch

@@ -0,0 +1,35 @@
+From 54928cb9eaa7143ff17f463efa7ed3109afdbf30 Mon Sep 17 00:00:00 2001
+From: "djm@openbsd.org" <djm@openbsd.org>
+Date: Thu, 4 Sep 2025 00:30:06 +0000
+Subject: [PATCH] upstream: don't allow \0 characters in url-encoded strings.
+ Suggested by David Leadbeater, ok deraadt@
+
+OpenBSD-Commit-ID: c92196cef0f970ceabc1e8007a80b01e9b7cd49c
+
+CVE: CVE-2025-61985
+
+Upstream-Status: Backport [https://github.com/openssh/openssh-portable/commit/43b3bff47bb029f2299bacb6a36057981b39fdb0]
+
+Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
+---
+ misc.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/misc.c b/misc.c
+index 6135b15..3d133b5 100644
+--- a/misc.c
++++ b/misc.c
+@@ -934,9 +934,10 @@ urldecode(const char *src)
+			*dst++ = ' ';
+			break;
+		case '%':
++			/* note: don't allow \0 characters */
+			if (!isxdigit((unsigned char)src[1]) ||
+			    !isxdigit((unsigned char)src[2]) ||
+-			    (ch = hexchar(src + 1)) == -1) {
++			    (ch = hexchar(src + 1)) == -1 || ch == 0) {
+				free(ret);
+				return NULL;
+			}
+--
+2.40.0

meta/recipes-connectivity/openssh/openssh_8.9p1.bb

@@ -39,6 +39,7 @@ SRC_URI = "http://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-${PV}.tar
            file://CVE-2024-6387.patch \
            file://CVE-2025-26465.patch \
            file://CVE-2025-32728.patch \
+           file://CVE-2025-61985.patch \
            "
 SRC_URI[sha256sum] = "fd497654b7ab1686dac672fb83dfb4ba4096e8b5ffcdaccd262380ae58bec5e7"