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wpa-supplicant: fix CVE-2021-0326

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In p2p_copy_client_info of p2p.c, there is a possible out of bounds write
due to a missing bounds check. This could lead to remote code execution
if the target device is performing a Wi-Fi Direct search, with no
additional execution privileges needed. User interaction is not needed
for exploitation.Product: AndroidVersions: Android-10 Android-11
Android-8.1 Android-9 Android ID: A-172937525

References:
https://nvd.nist.gov/vuln/detail/CVE-2021-0326

Upstream patches:
https://w1.fi/cgit/hostap/commit/?id=947272febe24a8f0ea828b5b2f35f13c3821901e<links_for_CVE_patches>

(From OE-Core rev: 629a275bbafe7436f73ace59ab06d44e316b6b9d)

Signed-off-by: Stefan Ghinea <stefan.ghinea@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit b7940edabe100512e8f558cc37f9da836feae74d)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Stefan Ghinea
2021-02-23 21:20:28 +02:00
committed by Richard Purdie
parent 41057791a7
commit 8581672cce
2 changed files with 46 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/CVE-2021-0326.patch Normal file
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@@ -0,0 +1,45 @@
From 947272febe24a8f0ea828b5b2f35f13c3821901e Mon Sep 17 00:00:00 2001
From: Jouni Malinen <jouni@codeaurora.org>
Date: Mon, 9 Nov 2020 11:43:12 +0200
Subject: [PATCH] P2P: Fix copying of secondary device types for P2P group
client
Parsing and copying of WPS secondary device types list was verifying
that the contents is not too long for the internal maximum in the case
of WPS messages, but similar validation was missing from the case of P2P
group information which encodes this information in a different
attribute. This could result in writing beyond the memory area assigned
for these entries and corrupting memory within an instance of struct
p2p_device. This could result in invalid operations and unexpected
behavior when trying to free pointers from that corrupted memory.
Upstream-Status: Backport
CVE: CVE-2021-0326
Reference to upstream patch:
[https://w1.fi/cgit/hostap/commit/?id=947272febe24a8f0ea828b5b2f35f13c3821901e]
Credit to OSS-Fuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27269
Fixes: e57ae6e19edf ("P2P: Keep track of secondary device types for peers")
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Signed-off-by: Stefan Ghinea <stefan.ghinea@windriver.com>
---
src/p2p/p2p.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/src/p2p/p2p.c b/src/p2p/p2p.c
index a08ba02..079270f 100644
--- a/src/p2p/p2p.c
+++ b/src/p2p/p2p.c
@@ -453,6 +453,8 @@ static void p2p_copy_client_info(struct p2p_device *dev,
dev->info.config_methods = cli->config_methods;
os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
+ if (dev->info.wps_sec_dev_type_list_len > WPS_SEC_DEV_TYPE_MAX_LEN)
+ dev->info.wps_sec_dev_type_list_len = WPS_SEC_DEV_TYPE_MAX_LEN;
os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
dev->info.wps_sec_dev_type_list_len);
}
--
2.17.1

1
meta/recipes-connectivity/wpa-supplicant/wpa-supplicant_2.9.bb
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@@ -29,6 +29,7 @@ SRC_URI = "http://w1.fi/releases/wpa_supplicant-${PV}.tar.gz \
file://0001-WPS-UPnP-Do-not-allow-event-subscriptions-with-URLs-.patch \
file://0002-WPS-UPnP-Fix-event-message-generation-using-a-long-U.patch \
file://0003-WPS-UPnP-Handle-HTTP-initiation-failures-for-events-.patch \
file://CVE-2021-0326.patch \
"
SRC_URI[md5sum] = "2d2958c782576dc9901092fbfecb4190"
SRC_URI[sha256sum] = "fcbdee7b4a64bea8177973299c8c824419c413ec2e3a95db63dd6a5dc3541f17"