mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-09-21 00:35:41 +00:00
52 lines
2.2 KiB
Diff
52 lines
2.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Brian Delwiche <delwiche@google.com>
|
|
Date: Mon, 22 Apr 2024 16:43:29 +0000
|
|
Subject: [PATCH] Fix heap-buffer overflow in sdp_utils.cc
|
|
|
|
Fuzzer identifies a case where sdpu_compare_uuid_with_attr crashes with
|
|
an out of bounds comparison. Although the bug claims this is due to a
|
|
comparison of a uuid with a smaller data field thana the discovery
|
|
attribute, my research suggests that this instead stems from a
|
|
comparison of a 128 bit UUID with a discovery attribute of some other,
|
|
invalid size.
|
|
|
|
Add checks for discovery attribute size.
|
|
|
|
Bug: 287184435
|
|
Test: atest bluetooth_test_gd_unit, net_test_stack_sdp
|
|
Tag: #security
|
|
Ignore-AOSP-First: Security
|
|
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:99210e2f251e2189c1eede15942c832e017404c2)
|
|
Merged-In: Ib536cbeac454efbf6af3d713c05c8e3e077e069b
|
|
Change-Id: Ib536cbeac454efbf6af3d713c05c8e3e077e069b
|
|
---
|
|
stack/sdp/sdp_utils.c | 9 ++++++++-
|
|
1 file changed, 8 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/stack/sdp/sdp_utils.c b/stack/sdp/sdp_utils.c
|
|
index e9df46068..d1dd94e13 100644
|
|
--- a/stack/sdp/sdp_utils.c
|
|
+++ b/stack/sdp/sdp_utils.c
|
|
@@ -850,13 +850,20 @@ BOOLEAN sdpu_compare_uuid_with_attr (tBT_UUID *p_btuuid, tSDP_DISC_ATTR *p_attr)
|
|
UINT16 attr_len = SDP_DISC_ATTR_LEN (p_attr->attr_len_type);
|
|
|
|
/* Since both UUIDs are compressed, lengths must match */
|
|
- if (p_btuuid->len != attr_len)
|
|
+ if (p_btuuid->len != attr_len) {
|
|
+ SDP_TRACE_ERROR("invalid length for discovery attribute");
|
|
return (FALSE);
|
|
+ }
|
|
|
|
if (p_btuuid->len == 2)
|
|
return (BOOLEAN)(p_btuuid->uu.uuid16 == p_attr->attr_value.v.u16);
|
|
else if (p_btuuid->len == 4)
|
|
return (BOOLEAN)(p_btuuid->uu.uuid32 == p_attr->attr_value.v.u32);
|
|
+ else if (attr_len != MAX_UUID_SIZE) {
|
|
+ SDP_TRACE_ERROR("invalid length for discovery attribute");
|
|
+ return (FALSE);
|
|
+ }
|
|
+
|
|
/* coverity[overrun-buffer-arg] */
|
|
/*
|
|
Event overrun-buffer-arg: Overrun of static array "&p_attr->attr_value.v.array" of size 4 bytes by passing it to a function which indexes it with argument "16U" at byte position 15
|