From e5eda809a41732dfa4988799360be3d1280c1209 Mon Sep 17 00:00:00 2001
From: Li Wang
Date: Tue, 1 Dec 2020 02:16:54 +0000
Subject: qemu: CVE-2020-29129 CVE-2020-29130
References:
https://nvd.nist.gov/vuln/detail/CVE-2020-29129
https://nvd.nist.gov/vuln/detail/CVE-2020-29130
backport patch from:
https://git.qemu.org/?p=libslirp.git;a=commit;h=2e1dcbc0c2af64fcb17009eaf2ceedd81be2b27f
Signed-off-by: Li Wang
Signed-off-by: Richard Purdie
---
meta/recipes-devtools/qemu/qemu.inc | 1 +
.../qemu/qemu/CVE-2020-29129-CVE-2020-29130.patch | 64 ++++++++++++++++++++++
2 files changed, 65 insertions(+)
create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2020-29129-CVE-2020-29130.patch
diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc
index 11be545cb5..bbe2a39755 100644
--- a/meta/recipes-devtools/qemu/qemu.inc
+++ b/meta/recipes-devtools/qemu/qemu.inc
@@ -33,6 +33,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
file://usb-fix-setup_len-init.patch \
file://0001-target-mips-Increase-number-of-TLB-entries-on-the-34.patch \
file://CVE-2020-24352.patch \
+ file://CVE-2020-29129-CVE-2020-29130.patch \
"
UPSTREAM_CHECK_REGEX = "qemu-(?P\d+(\.\d+)+)\.tar"
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2020-29129-CVE-2020-29130.patch b/meta/recipes-devtools/qemu/qemu/CVE-2020-29129-CVE-2020-29130.patch
new file mode 100644
index 0000000000..e5829f6dad
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2020-29129-CVE-2020-29130.patch
@@ -0,0 +1,64 @@
+From 2e1dcbc0c2af64fcb17009eaf2ceedd81be2b27f Mon Sep 17 00:00:00 2001
+From: Prasad J Pandit
+Date: Thu, 26 Nov 2020 19:27:06 +0530
+Subject: [PATCH] slirp: check pkt_len before reading protocol header
+MIME-Version: 1.0
+Content-Type: text/plain; charset=utf8
+Content-Transfer-Encoding: 8bit
+
+While processing ARP/NCSI packets in 'arp_input' or 'ncsi_input'
+routines, ensure that pkt_len is large enough to accommodate the
+respective protocol headers, lest it should do an OOB access.
+Add check to avoid it.
+
+CVE-2020-29129 CVE-2020-29130
+ QEMU: slirp: out-of-bounds access while processing ARP/NCSI packets
+ -> https://www.openwall.com/lists/oss-security/2020/11/27/1
+
+Reported-by: Qiuhao Li
+Signed-off-by: Prasad J Pandit
+Message-Id: <20201126135706.273950-1-ppandit@redhat.com>
+Reviewed-by: Marc-Andrà Lureau
+
+Upstream-Status: Backport
+CVE: CVE-2020-29129 CVE-2020-29130
+[https://git.qemu.org/?p=libslirp.git;a=commit;h=2e1dcbc0c2af64fcb17009eaf2ceedd81be2b27f]
+Signed-off-by: Li Wang
+---
+ slirp/src/ncsi.c | 4 ++++
+ slirp/src/slirp.c | 4 ++++
+ 2 files changed, 8 insertions(+)
+
+diff --git a/slirp/src/ncsi.c b/slirp/src/ncsi.c
+index 3c1dfef..75dcc08 100644
+--- a/slirp/src/ncsi.c
++++ b/slirp/src/ncsi.c
+@@ -148,6 +148,10 @@ void ncsi_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
+ uint32_t checksum;
+ uint32_t *pchecksum;
+
++ if (pkt_len < ETH_HLEN + sizeof(struct ncsi_pkt_hdr)) {
++ return; /* packet too short */
++ }
++
+ memset(ncsi_reply, 0, sizeof(ncsi_reply));
+
+ memset(reh->h_dest, 0xff, ETH_ALEN);
+diff --git a/slirp/src/slirp.c b/slirp/src/slirp.c
+index dba7c98..9be58e2 100644
+--- a/slirp/src/slirp.c
++++ b/slirp/src/slirp.c
+@@ -756,6 +756,10 @@ static void arp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
+ return;
+ }
+
++ if (pkt_len < ETH_HLEN + sizeof(struct slirp_arphdr)) {
++ return; /* packet too short */
++ }
++
+ ar_op = ntohs(ah->ar_op);
+ switch (ar_op) {
+ case ARPOP_REQUEST:
+--
+2.17.1
+
--
cgit 1.2.3-korg