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Issue metadata

Status: Duplicate
Merged: issue 768203
Owner: ----
Closed: Sep 2017
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug-Security



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Bad-cast to blink::LayoutObject from invalid vptr;blink::AXLayoutObject::GetDocument;blink::AXObjectCacheImpl::PostPlatformNotification

Project Member Reported by ClusterFuzz, Sep 28 2017

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5008410662928384

Fuzzer: inferno_twister_c
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: Bad-cast
Crash Address: 0x100fb282c0c8
Crash State:
  Bad-cast to blink::LayoutObject from invalid vptr
  blink::AXLayoutObject::GetDocument
  blink::AXObjectCacheImpl::PostPlatformNotification
  
Sanitizer: undefined (UBSAN)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=502126:502152

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5008410662928384

Issue filed automatically.

See https://github.com/google/clusterfuzz-tools for more information.
 
Project Member

Comment 1 by sheriffbot@chromium.org, Sep 28 2017

Labels: M-63
Project Member

Comment 2 by sheriffbot@chromium.org, Sep 28 2017

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

If this doesn't affect a release branch, or has not been properly classified for severity, please update the Security_Impact or Security_Severity labels, and remove the ReleaseBlock label. To disable this altogether, apply ReleaseBlock-NA.

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

Comment 3 by sheriffbot@chromium.org, Sep 28 2017

Labels: Pri-1
Mergedinto: 768203
Status: Duplicate (was: Untriaged)
Looks similar to 768203
Project Member

Comment 5 by ClusterFuzz, Oct 25 2017

ClusterFuzz has detected this issue as fixed in range 511210:511245.

Detailed report: https://clusterfuzz.com/testcase?key=5008410662928384

Fuzzer: inferno_twister_c
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: Bad-cast
Crash Address: 0x100fb282c0c8
Crash State:
  Bad-cast to blink::LayoutObject from invalid vptr
  blink::AXLayoutObject::GetDocument
  blink::AXObjectCacheImpl::PostPlatformNotification
  
Sanitizer: undefined (UBSAN)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=502126:502152
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=511210:511245

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5008410662928384

See https://github.com/google/clusterfuzz-tools 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 6 by ClusterFuzz, Nov 3 2017

ClusterFuzz has detected this issue as fixed in range 511210:511245.

Detailed report: https://clusterfuzz.com/testcase?key=5008410662928384

Fuzzer: inferno_twister_c
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: Bad-cast
Crash Address: 0x100fb282c0c8
Crash State:
  Bad-cast to blink::LayoutObject from invalid vptr
  blink::AXLayoutObject::GetDocument
  blink::AXObjectCacheImpl::PostPlatformNotification
  
Sanitizer: undefined (UBSAN)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=502126:502152
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=511210:511245

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5008410662928384

See https://github.com/google/clusterfuzz-tools 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 sheriffbot@chromium.org, Feb 8 2018

Labels: -Restrict-View-SecurityTeam 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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