qemu: Fix CVE-2023-3180

A flaw was found in the QEMU virtual crypto device while handling
data encryption/decryption requests in virtio_crypto_handle_sym_req.
There is no check for the value of `src_len` and `dst_len` in
virtio_crypto_sym_op_helper, potentially leading to a heap buffer
overflow when the two values differ.

References:
https://nvd.nist.gov/vuln/detail/CVE-2023-3180

(From OE-Core rev: 2038b5e977481cac2e9e35101a467fbd5268231e)

Signed-off-by: Soumya Sambu <soumya.sambu@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 53 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc
index c8e1d28654..cd17a11335 100644
--- a/meta/recipes-devtools/qemu/qemu.inc
+++ b/meta/recipes-devtools/qemu/qemu.inc
@@ -41,6 +41,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
            file://CVE-2023-3255.patch \
            file://CVE-2023-2861.patch \
            file://CVE-2023-3354.patch \
+           file://CVE-2023-3180.patch \
            "
 UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"
 
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2023-3180.patch b/meta/recipes-devtools/qemu/qemu/CVE-2023-3180.patch
new file mode 100644
index 0000000000..cd9f85fd43
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2023-3180.patch
@@ -0,0 +1,52 @@
+From 9d38a8434721a6479fe03fb5afb150ca793d3980 Mon Sep 17 00:00:00 2001
+From: zhenwei pi <pizhenwei@bytedance.com>
+Date: Thu, 3 Aug 2023 10:43:13 +0800
+Subject: [PATCH] virtio-crypto: verify src&dst buffer length for sym request
+
+For symmetric algorithms, the length of ciphertext must be as same
+as the plaintext.
+The missing verification of the src_len and the dst_len in
+virtio_crypto_sym_op_helper() may lead buffer overflow/divulged.
+
+This patch is originally written by Yiming Tao for QEMU-SECURITY,
+resend it(a few changes of error message) in qemu-devel.
+
+Fixes: CVE-2023-3180
+Fixes: 04b9b37e
+
+("virtio-crypto: add data queue processing handler")
+Cc: Gonglei <arei.gonglei@huawei.com>
+Cc: Mauro Matteo Cascella <mcascell@redhat.com>
+Cc: Yiming Tao <taoym@zju.edu.cn>
+Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
+Message-Id: <20230803024314.29962-2-pizhenwei@bytedance.com>
+Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
+Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
+
+CVE: CVE-2023-3180
+
+Upstream-Status: Backport from [https://gitlab.com/qemu-project/qemu/-/commit/9d38a8434721a6479fe03fb5afb150ca793d3980]
+
+Signed-off-by: Soumya Sambu <soumya.sambu@windriver.com>
+---
+ hw/virtio/virtio-crypto.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c
+index 97da74e71..fdb592861 100644
+--- a/hw/virtio/virtio-crypto.c
++++ b/hw/virtio/virtio-crypto.c
+@@ -633,6 +633,11 @@ virtio_crypto_sym_op_helper(VirtIODevice *vdev,
+         return NULL;
+     }
+
++    if (unlikely(src_len != dst_len)) {
++        virtio_error(vdev, "sym request src len is different from dst len");
++        return NULL;
++    }
++
+     max_len = (uint64_t)iv_len + aad_len + src_len + dst_len + hash_result_len;
+     if (unlikely(max_len > vcrypto->conf.max_size)) {
+         virtio_error(vdev, "virtio-crypto too big length");
+--
+2.40.0