tcpreplay: fix CVE-2025-9157

A vulnerability was determined in appneta tcpreplay up to 4.5.2-beta2.
The impacted element is the function untrunc_packet of the file
src/tcpedit/edit_packet.c of the component tcprewrite. Executing
manipulation can lead to use after free. It is possible to launch
the attack on the local host. The exploit has been publicly disclosed
and may be utilized. This patch is called 73008f261f1cdf7a1087dc8759115242696d35da.
Applying a patch is advised to resolve this issue.

Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
(cherry picked from commit 0538af085a47b038e369db9872ffed8945b200c2)
Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
Signed-off-by: Anuj Mittal <anuj.mittal@oss.qualcomm.com>

2 files changed, 45 insertions, 0 deletions

diff --git a/meta-networking/recipes-support/tcpreplay/tcpreplay/CVE-2025-9157.patch b/meta-networking/recipes-support/tcpreplay/tcpreplay/CVE-2025-9157.patch
new file mode 100644
index 0000000000..e52ec0dffc
--- /dev/null
+++ b/meta-networking/recipes-support/tcpreplay/tcpreplay/CVE-2025-9157.patch
@@ -0,0 +1,44 @@
+From 73008f261f1cdf7a1087dc8759115242696d35da Mon Sep 17 00:00:00 2001
+From: Fred Klassen <fred.klassen@broadcom.com>
+Date: Mon, 18 Aug 2025 18:35:16 -0700
+Subject: [PATCH] Bug #970 tcprewrite: --fixlen: do not use realloc
+
+No need to realloc if buffer is already proven to be big enough.
+
+CVE: CVE-2025-9157
+
+Upstream-Status: Backport [https://github.com/appneta/tcpreplay/commit/73008f261f1cdf7a1087dc8759115242696d35da]
+
+Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
+---
+ src/tcpedit/edit_packet.c | 1 -
+ src/tcprewrite.c          | 2 ++
+ 2 files changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/src/tcpedit/edit_packet.c b/src/tcpedit/edit_packet.c
+index 1025ff9..f9ade8f 100644
+--- a/src/tcpedit/edit_packet.c
++++ b/src/tcpedit/edit_packet.c
+@@ -558,7 +558,6 @@ untrunc_packet(tcpedit_t *tcpedit,
+          * which seems like a corrupted pcap
+          */
+         if (pkthdr->len > pkthdr->caplen) {
+-            packet = safe_realloc(packet, pkthdr->len + PACKET_HEADROOM);
+             memset(packet + pkthdr->caplen, '\0', pkthdr->len - pkthdr->caplen);
+             pkthdr->caplen = pkthdr->len;
+         } else if (pkthdr->len < pkthdr->caplen) {
+diff --git a/src/tcprewrite.c b/src/tcprewrite.c
+index c9aa52c..ee05a26 100644
+--- a/src/tcprewrite.c
++++ b/src/tcprewrite.c
+@@ -270,6 +270,8 @@ rewrite_packets(tcpedit_t *tcpedit_ctx, pcap_t *pin, pcap_dumper_t *pout)
+
+         if (pkthdr.caplen > MAX_SNAPLEN)
+             errx(-1, "Frame too big, caplen %d exceeds %d", pkthdr.caplen, MAX_SNAPLEN);
++        if (pkthdr.len > MAX_SNAPLEN)
++            errx(-1, "Frame too big, len %d exceeds %d", pkthdr.len, MAX_SNAPLEN);
+         /*
+          * copy over the packet so we can pad it out if necessary and
+          * because pcap_next() returns a const ptr
+--
+2.40.0
diff --git a/meta-networking/recipes-support/tcpreplay/tcpreplay_4.4.4.bb b/meta-networking/recipes-support/tcpreplay/tcpreplay_4.4.4.bb
index a784190868..866661b4d1 100644
--- a/meta-networking/recipes-support/tcpreplay/tcpreplay_4.4.4.bb
+++ b/meta-networking/recipes-support/tcpreplay/tcpreplay_4.4.4.bb
@@ -15,6 +15,7 @@ SRC_URI = "https://github.com/appneta/${BPN}/releases/download/v${PV}/${BP}.tar.
     file://CVE-2023-43279.patch \
     file://CVE-2024-22654-0001.patch \
     file://CVE-2024-22654-0002.patch \
+    file://CVE-2025-9157.patch \
 "
 
 SRC_URI[sha256sum] = "44f18fb6d3470ecaf77a51b901a119dae16da5be4d4140ffbb2785e37ad6d4bf"