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Issue metadata

Status: Verified
Owner:
Closed: Sep 2016
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug-Security
Team-Accessibility



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Heap-use-after-free in ui::AXNode::id

Project Member Reported by ClusterFuzz, Sep 18 2016

Issue description

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6546863803334656

Fuzzer: libfuzzer_ax_tree_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: Heap-use-after-free READ 4
Crash Address: 0x6130000007b8
Crash State:
  ui::AXNode::id
  ui::AXTreeUpdateState::HasChangedNode
  ui::AXTree::DestroySubtree
  
Recommended Security Severity: High

Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan_debug&range=418280:418374

Minimized Testcase (0.02 Kb): https://cluster-fuzz.appspot.com/download/AMIfv95mviz-AZEUYEWQM3qRDnZ6wu8AWpe_6f9CQp1Z3BRM30L1HbNz5Zxsn97L768Wn4BT0JjvlTLlrEHc4_QMGKFrXehZAtu1NqYcXFwGFXYo09Y_4DcwGlZpSoyT2uSZ8kcu1-IQLgmnyNq5payy3Mh6hcvknA?testcase_id=6546863803334656

Issue filed automatically.

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.
 

Comment 1 by mmoroz@chromium.org, Sep 19 2016

Cc: mmoroz@chromium.org kcc@chromium.org aizatsky@chromium.org
Components: UI>Accessibility
Owner: dmazz...@chromium.org
Project Member

Comment 2 by sheriffbot@chromium.org, Sep 19 2016

Labels: M-55
Project Member

Comment 3 by sheriffbot@chromium.org, Sep 19 2016

Labels: ReleaseBlock-Beta
This issue is a security regression. If you are not able to fix this quickly, please revert the change that introduced it.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
Project Member

Comment 4 by sheriffbot@chromium.org, Sep 19 2016

Labels: Pri-1
Project Member

Comment 5 by sheriffbot@chromium.org, Sep 19 2016

Status: Assigned (was: Untriaged)
Project Member

Comment 6 by ClusterFuzz, Sep 29 2016

ClusterFuzz has detected this issue as fixed in range 421612:421673.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6546863803334656

Fuzzer: libfuzzer_ax_tree_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: Heap-use-after-free READ 4
Crash Address: 0x6130000007b8
Crash State:
  ui::AXNode::id
  ui::AXTreeUpdateState::HasChangedNode
  ui::AXTree::DestroySubtree
  
Recommended Security Severity: High

Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan_debug&range=418280:418374
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan_debug&range=421612:421673

Minimized Testcase (0.02 Kb): https://cluster-fuzz.appspot.com/download/AMIfv95mviz-AZEUYEWQM3qRDnZ6wu8AWpe_6f9CQp1Z3BRM30L1HbNz5Zxsn97L768Wn4BT0JjvlTLlrEHc4_QMGKFrXehZAtu1NqYcXFwGFXYo09Y_4DcwGlZpSoyT2uSZ8kcu1-IQLgmnyNq5payy3Mh6hcvknA?testcase_id=6546863803334656

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.
Project Member

Comment 7 by ClusterFuzz, Sep 29 2016

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase is verified as fixed, closing issue.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.
Project Member

Comment 8 by sheriffbot@chromium.org, Sep 29 2016

Labels: -Restrict-View-SecurityTeam Restrict-View-SecurityNotify
Labels: -ReleaseBlock-Beta
Project Member

Comment 10 by sheriffbot@chromium.org, Jan 5 2017

Labels: -Restrict-View-SecurityNotify allpublic
This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

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