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u-boot: Fix CVE-2022-30767

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This patch mitigates the vulnerability identified via CVE-2019-14196.
The previous patch was bypassed/ineffective, and now the vulnerability
is identified via CVE-2022-30767. The patch removes the sanity check
introduced to mitigate CVE-2019-14196 since it's ineffective.
filefh3_length is changed to unsigned type integer, preventing negative
numbers from being used during comparison with positive values during
size sanity checks.

(From OE-Core rev: b7072637ba110718714745a01d67e1b6b0096165)

Signed-off-by: Carlos Dominguez <carlos.dominguez@windriver.com>

Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
This commit is contained in:
Carlos Dominguez
2025-02-19 16:18:12 +08:00
committed by Steve Sakoman
parent 975fa48315
commit d552f85037
2 changed files with 45 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta/recipes-bsp/u-boot/files/0001-CVE-2022-30767.patch
+44
View File
@@ -0,0 +1,44 @@
From bdbf7a05e26f3c5fd437c99e2755ffde186ddc80 Thr Jun 2 00:00:00 2022
From: Andrea zi0Black Cappa <zi0Black@protonmail.com>
Date: Tue, 14 Jun 2022 17:16:00 +0200
Subject: [PATCH] net: nfs: Fix CVE-2022-30767 (old CVE-2019-14196)
This patch mitigates the vulnerability identified via CVE-2019-14196.
The previous patch was bypassed/ineffective, and now the vulnerability
is identified via CVE-2022-30767. The patch removes the sanity check
introduced to mitigate CVE-2019-14196 since it's ineffective.
filefh3_length is changed to unsigned type integer, preventing negative
numbers from being used during comparison with positive values during
size sanity checks.
CVE: CVE-2019-14196
Upstream-Status: Backport [https://source.denx.de/u-boot/u-boot/-/commit/bdbf7a05e26f3c5fd437c99e2755ffde186ddc80]
Signed-off-by: Andrea zi0Black Cappa <zi0Black@protonmail.com>
Signed-off-by: Carlos Dominguez <carlos.dominguez@windriver.com>
---
net/nfs.c | 4 +---
1 file changed, 1 insertions(+), 3 deletions(-)
diff --git a/net/nfs.c b/net/nfs.c
index 70d0e08bde..3003f54aac 100644
--- a/net/nfs.c
+++ b/net/nfs.c
@@ -57,7 +57,7 @@ static ulong nfs_timeout = NFS_TIMEOUT;
static char dirfh[NFS_FHSIZE]; /* NFSv2 / NFSv3 file handle of directory */
static char filefh[NFS3_FHSIZE]; /* NFSv2 / NFSv3 file handle */
-static int filefh3_length; /* (variable) length of filefh when NFSv3 */
+static unsigned int filefh3_length; /* (variable) length of filefh when NFSv3 */
static enum net_loop_state nfs_download_state;
static struct in_addr nfs_server_ip;
@@ -578,8 +578,6 @@ static int nfs_lookup_reply(uchar *pkt, unsigned len)
filefh3_length = ntohl(rpc_pkt.u.reply.data[1]);
if (filefh3_length > NFS3_FHSIZE)
filefh3_length = NFS3_FHSIZE;
- if (((uchar *)&(rpc_pkt.u.reply.data[0]) - (uchar *)(&rpc_pkt) + filefh3_length) > len)
- return -NFS_RPC_DROP;
memcpy(filefh, rpc_pkt.u.reply.data + 2, filefh3_length);
}
meta/recipes-bsp/u-boot/u-boot_2022.01.bb
+1
View File
@@ -7,6 +7,7 @@ SRC_URI += " file://0001-riscv32-Use-double-float-ABI-for-rv32.patch \
file://0001-fs-squashfs-sqfs_read-Prevent-arbitrary-code-executi.patch \
file://0001-net-Check-for-the-minimum-IP-fragmented-datagram-siz.patch \
file://0001-fs-squashfs-Use-kcalloc-when-relevant.patch \
file://0001-CVE-2022-30767.patch \
"
DEPENDS += "bc-native dtc-native python3-setuptools-native"