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Issue metadata

Status: Verified
Owner:
Closed: May 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug-Security



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Bad-cast to blink::CSSProperty from invalid vptr in blink::ToCSSProperty

Project Member Reported by ClusterFuzz, May 18 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=4887682451505152

Fuzzer: lcamtuf_cross_fuzz
Job Type: linux_cfi_chrome
Platform Id: linux

Crash Type: Bad-cast
Crash Address: 0x55e7047f5640
Crash State:
  Bad-cast to blink::CSSProperty from invalid vptr
  blink::ToCSSProperty
  blink::CSSProperty::Get
  
Sanitizer: cfi (CFI)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=linux_cfi_chrome&range=559838:559850

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4887682451505152

Issue filed automatically.

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

Comment 1 by ClusterFuzz, May 18 2018

Components: Blink>CSS
Labels: Test-Predator-Auto-Components
Automatically applying components based on crash stacktrace and information from OWNERS files.

If this is incorrect, please apply the Test-Predator-Wrong-Components label.
Project Member

Comment 2 by ClusterFuzz, May 18 2018

Labels: Test-Predator-Auto-Owner
Owner: andruud@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/aae947a01acaf7bce18c309244b64c8ef110a349 (Enumerate aliases on CSSPropertyDeclaration.).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.
Project Member

Comment 3 by sheriffbot@chromium.org, May 19 2018

Labels: M-68
Project Member

Comment 4 by sheriffbot@chromium.org, May 19 2018

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 5 by sheriffbot@chromium.org, May 19 2018

Labels: Pri-1
Project Member

Comment 6 by ClusterFuzz, May 23 2018

ClusterFuzz has detected this issue as fixed in range 560539:560551.

Detailed report: https://clusterfuzz.com/testcase?key=4887682451505152

Fuzzer: lcamtuf_cross_fuzz
Job Type: linux_cfi_chrome
Platform Id: linux

Crash Type: Bad-cast
Crash Address: 0x55e7047f5640
Crash State:
  Bad-cast to blink::CSSProperty from invalid vptr
  blink::ToCSSProperty
  blink::CSSProperty::Get
  
Sanitizer: cfi (CFI)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=linux_cfi_chrome&range=559838:559850
Fixed: https://clusterfuzz.com/revisions?job=linux_cfi_chrome&range=560539:560551

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4887682451505152

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 ClusterFuzz, May 23 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 4887682451505152 is verified as fixed, so closing issue as verified.

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

Comment 8 by sheriffbot@chromium.org, May 24 2018

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

Comment 10 by sheriffbot@chromium.org, Aug 30

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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