[OE-core][scarthgap 1/8] net-tools: patch CVE-2025-46836

[Steve Sakoman <steve@sakoman.com>]

From: Peter Marko <peter.marko@siemens.com>

Backport patch for this CVE and also patch for its regression.

Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
---
 .../net-tools/CVE-2025-46836-01.patch         | 91 +++++++++++++++++++
 .../net-tools/CVE-2025-46836-02.patch         | 31 +++++++
 .../net-tools/net-tools_2.10.bb               |  2 +
 3 files changed, 124 insertions(+)
 create mode 100644 meta/recipes-extended/net-tools/net-tools/CVE-2025-46836-01.patch
 create mode 100644 meta/recipes-extended/net-tools/net-tools/CVE-2025-46836-02.patch

diff --git a/meta/recipes-extended/net-tools/net-tools/CVE-2025-46836-01.patch b/meta/recipes-extended/net-tools/net-tools/CVE-2025-46836-01.patch
new file mode 100644
index 0000000000..0d55512497
--- /dev/null
+++ b/meta/recipes-extended/net-tools/net-tools/CVE-2025-46836-01.patch
@@ -0,0 +1,91 @@
+From 7a8f42fb20013a1493d8cae1c43436f85e656f2d Mon Sep 17 00:00:00 2001
+From: Zephkeks <zephyrofficialdiscord@gmail.com>
+Date: Tue, 13 May 2025 11:04:17 +0200
+Subject: [PATCH] CVE-2025-46836: interface.c: Stack-based Buffer Overflow in
+ get_name()
+
+Coordinated as GHSA-pfwf-h6m3-63wf
+
+CVE: CVE-2025-46836
+Upstream-Status: Backport [https://sourceforge.net/p/net-tools/code/ci/7a8f42fb20013a1493d8cae1c43436f85e656f2d/]
+Signed-off-by: Peter Marko <peter.marko@siemens.com>
+---
+ lib/interface.c | 63 ++++++++++++++++++++++++++++++-------------------
+ 1 file changed, 39 insertions(+), 24 deletions(-)
+
+diff --git a/lib/interface.c b/lib/interface.c
+index 71d4163..a054f12 100644
+--- a/lib/interface.c
++++ b/lib/interface.c
+@@ -211,32 +211,47 @@ out:
+ }
+ 
+ static const char *get_name(char *name, const char *p)
++/* Safe version — guarantees at most IFNAMSIZ‑1 bytes are copied
++   and the destination buffer is always NUL‑terminated.             */
+ {
+-    while (isspace(*p))
+-	p++;
+-    while (*p) {
+-	if (isspace(*p))
+-	    break;
+-	if (*p == ':') {	/* could be an alias */
+-		const char *dot = p++;
+- 		while (*p && isdigit(*p)) p++;
+-		if (*p == ':') {
+-			/* Yes it is, backup and copy it. */
+-			p = dot;
+-			*name++ = *p++;
+-			while (*p && isdigit(*p)) {
+-				*name++ = *p++;
+-			}
+-		} else {
+-			/* No, it isn't */
+-			p = dot;
+-	    }
+-	    p++;
+-	    break;
+-	}
+-	*name++ = *p++;
++    char       *dst = name;                 /* current write ptr          */
++    const char *end = name + IFNAMSIZ - 1;  /* last byte we may write     */
++
++    /* Skip leading white‑space. */
++    while (isspace((unsigned char)*p))
++        ++p;
++
++    /* Copy until white‑space, end of string, or buffer full. */
++    while (*p && !isspace((unsigned char)*p) && dst < end) {
++        if (*p == ':') {                    /* possible alias veth0:123:  */
++            const char *dot = p;            /* remember the colon         */
++            ++p;
++            while (*p && isdigit((unsigned char)*p))
++                ++p;
++
++            if (*p == ':') {                /* confirmed alias            */
++                p = dot;                    /* rewind and copy it all     */
++
++                /* copy the colon */
++                if (dst < end)
++                    *dst++ = *p++;
++
++                /* copy the digits */
++                while (*p && isdigit((unsigned char)*p) && dst < end)
++                    *dst++ = *p++;
++
++                if (*p == ':')              /* consume trailing colon     */
++                    ++p;
++            } else {              /* if so treat as normal */
++                p = dot;
++            }
++            break;                          /* interface name ends here   */
++        }
++
++        *dst++ = *p++;                      /* ordinary character copy    */
+     }
+-    *name++ = '\0';
++
++    *dst = '\0';                            /* always NUL‑terminate       */
+     return p;
+ }
+ 
diff --git a/meta/recipes-extended/net-tools/net-tools/CVE-2025-46836-02.patch b/meta/recipes-extended/net-tools/net-tools/CVE-2025-46836-02.patch
new file mode 100644
index 0000000000..d2c3673a24
--- /dev/null
+++ b/meta/recipes-extended/net-tools/net-tools/CVE-2025-46836-02.patch
@@ -0,0 +1,31 @@
+From ddb0e375fb9ca95bb69335540b85bbdaa2714348 Mon Sep 17 00:00:00 2001
+From: Bernd Eckenfels <net-tools@lina.inka.de>
+Date: Sat, 17 May 2025 21:53:23 +0200
+Subject: [PATCH] Interface statistic regression after 7a8f42fb2
+
+CVE: CVE-2025-46836
+Upstream-Status: Backport [https://sourceforge.net/p/net-tools/code/ci/ddb0e375fb9ca95bb69335540b85bbdaa2714348/]
+Signed-off-by: Peter Marko <peter.marko@siemens.com>
+---
+ lib/interface.c | 5 ++---
+ 1 file changed, 2 insertions(+), 3 deletions(-)
+
+diff --git a/lib/interface.c b/lib/interface.c
+index a054f12..ca4adf1 100644
+--- a/lib/interface.c
++++ b/lib/interface.c
+@@ -239,12 +239,11 @@ static const char *get_name(char *name, const char *p)
+                 /* copy the digits */
+                 while (*p && isdigit((unsigned char)*p) && dst < end)
+                     *dst++ = *p++;
+-
+-                if (*p == ':')              /* consume trailing colon     */
+-                    ++p;
+             } else {              /* if so treat as normal */
+                 p = dot;
+             }
++            if (*p == ':')                  /* consume trailing colon */
++                ++p;
+             break;                          /* interface name ends here   */
+         }
+ 
diff --git a/meta/recipes-extended/net-tools/net-tools_2.10.bb b/meta/recipes-extended/net-tools/net-tools_2.10.bb
index 33304297ec..c4d298181a 100644
--- a/meta/recipes-extended/net-tools/net-tools_2.10.bb
+++ b/meta/recipes-extended/net-tools/net-tools_2.10.bb
@@ -11,6 +11,8 @@ SRC_URI = "git://git.code.sf.net/p/net-tools/code;protocol=https;branch=master \
     file://net-tools-config.h \
     file://net-tools-config.make \
     file://Add_missing_headers.patch \
+    file://CVE-2025-46836-01.patch \
+    file://CVE-2025-46836-02.patch \
 "
 
 S = "${WORKDIR}/git"
-- 
2.43.0