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45 lines
1.9 KiB
Diff
45 lines
1.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Ted Wang <tedwang@google.com>
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Date: Thu, 13 Jan 2022 15:00:32 +0800
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Subject: [PATCH] Security fix OOB read due to invalid count in
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stack/avrc/avrc_pars_ct
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Bug: 205837191
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Tag: #security
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Test: PoC test program
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Ignore-AOSP-First: Security
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Change-Id: I7b5bcb6551a8c0c015566327e13ba719271ce374
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Merged-In: I7b5bcb6551a8c0c015566327e13ba719271ce374
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(cherry picked from commit 60a5d2f63bf95ed386a2ca6c43f1d88bb1d07003)
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Merged-In:I7b5bcb6551a8c0c015566327e13ba719271ce374
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---
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stack/avrc/avrc_pars_ct.cc | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/stack/avrc/avrc_pars_ct.cc b/stack/avrc/avrc_pars_ct.cc
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index f3483d7fe..ef5aa1647 100644
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--- a/stack/avrc/avrc_pars_ct.cc
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+++ b/stack/avrc/avrc_pars_ct.cc
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@@ -543,6 +543,10 @@ static tAVRC_STS avrc_ctrl_pars_vendor_rsp(tAVRC_MSG_VENDOR* p_msg,
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p_result->get_caps.capability_id,
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p_result->get_caps.count);
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if (p_result->get_caps.capability_id == AVRC_CAP_COMPANY_ID) {
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+ if (p_result->get_caps.count > AVRC_CAP_MAX_NUM_COMP_ID) {
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+ android_errorWriteLog(0x534e4554, "205837191");
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+ return AVRC_STS_INTERNAL_ERR;
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+ }
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min_len += MIN(p_result->get_caps.count, AVRC_CAP_MAX_NUM_COMP_ID) * 3;
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if (len < min_len) goto length_error;
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for (int xx = 0; ((xx < p_result->get_caps.count) &&
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@@ -552,6 +556,10 @@ static tAVRC_STS avrc_ctrl_pars_vendor_rsp(tAVRC_MSG_VENDOR* p_msg,
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}
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} else if (p_result->get_caps.capability_id ==
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AVRC_CAP_EVENTS_SUPPORTED) {
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+ if (p_result->get_caps.count > AVRC_CAP_MAX_NUM_EVT_ID) {
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+ android_errorWriteLog(0x534e4554, "205837191");
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+ return AVRC_STS_INTERNAL_ERR;
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+ }
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min_len += MIN(p_result->get_caps.count, AVRC_CAP_MAX_NUM_EVT_ID);
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if (len < min_len) goto length_error;
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for (int xx = 0; ((xx < p_result->get_caps.count) &&
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