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qemu: fix CVE-2023-3255

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QEMU: VNC: infinite loop in inflate_buffer() leads to denial of service

Reference:
https://nvd.nist.gov/vuln/detail/CVE-2023-3255

(From OE-Core rev: 886536b056230a9d72c900eacc8d1d8b44bd2836)

Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
This commit is contained in:
Yogita Urade
2023-08-10 07:00:11 +00:00
committed by Steve Sakoman
parent f86817b160
commit 911a4b03a5
2 changed files with 66 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
meta/recipes-devtools/qemu/qemu.inc
View File

@@ -38,6 +38,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
file://ppc.patch \
file://CVE-2023-0330.patch \
file://CVE-2023-3301.patch \
file://CVE-2023-3255.patch \
"
UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"

65
meta/recipes-devtools/qemu/qemu/CVE-2023-3255.patch Normal file
View File

@@ -0,0 +1,65 @@
From d921fea338c1059a27ce7b75309d7a2e485f710b Mon Sep 17 00:00:00 2001
From: Mauro Matteo Cascella <mcascell@redhat.com>
Date: Wed, 2 Aug 2023 12:29:55 +0000
Subject: [PATCH] ui/vnc-clipboard: fix infinite loop in inflate_buffer
(CVE-2023-3255) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit MIME-Version: 1.0 Content-Type: text/plain;
charset=UTF-8 Content-Transfer-Encoding: 8bit
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
A wrong exit condition may lead to an infinite loop when inflating a
valid zlib buffer containing some extra bytes in the `inflate_buffer`
function. The bug only occurs post-authentication. Return the buffer
immediately if the end of the compressed data has been reached
(Z_STREAM_END).
Fixes: CVE-2023-3255
Fixes: 0bf41cab ("ui/vnc: clipboard support")
Reported-by: Kevin Denis <kevin.denis@synacktiv.com>
Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Tested-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-ID: <20230704084210.101822-1-mcascell@redhat.com>
CVE: CVE-2023-3255
Upstream-Status: Backport [https://github.com/qemu/qemu/commit/d921fea338c1059a27ce7b75309d7a2e485f710b]
Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
---
ui/vnc-clipboard.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/ui/vnc-clipboard.c b/ui/vnc-clipboard.c
index 8aeadfaa2..c759be343 100644
--- a/ui/vnc-clipboard.c
+++ b/ui/vnc-clipboard.c
@@ -50,8 +50,11 @@ static uint8_t *inflate_buffer(uint8_t *in, uint32_t in_len, uint32_t *size)
ret = inflate(&stream, Z_FINISH);
switch (ret) {
case Z_OK:
- case Z_STREAM_END:
break;
+ case Z_STREAM_END:
+ *size = stream.total_out;
+ inflateEnd(&stream);
+ return out;
case Z_BUF_ERROR:
out_len <<= 1;
if (out_len > (1 << 20)) {
@@ -66,11 +69,6 @@ static uint8_t *inflate_buffer(uint8_t *in, uint32_t in_len, uint32_t *size)
}
}
- *size = stream.total_out;
- inflateEnd(&stream);
-
- return out;
-
err_end:
inflateEnd(&stream);
err:
--
2.40.0