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Issue metadata

Status: Verified
Owner: ----
Closed: Aug 16
Cc:
Type: Bug



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Issue 9892: libreoffice/docxfuzzer: Null-dereference WRITE in oox::drawingml::ShapeContext::onCreateContext

Reported by ClusterFuzz-External, Aug 14 Project Member

Issue description

Detailed report: https://oss-fuzz.com/testcase?key=5754558830608384

Project: libreoffice
Fuzzer: libFuzzer_libreoffice_docxfuzzer
Fuzz target binary: docxfuzzer
Job Type: libfuzzer_ubsan_libreoffice
Platform Id: linux

Crash Type: Null-dereference WRITE
Crash Address: 0x00000000003c
Crash State:
  oox::drawingml::ShapeContext::onCreateContext
  oox::drawingml::ShapeContext::onCreateContext
  oox::core::ContextHandler2Helper::implCreateChildContext
  
Sanitizer: undefined (UBSAN)

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_ubsan_libreoffice&range=201807261958:201808110355

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5754558830608384

Issue filed automatically.

See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md for more information.

This bug is subject to a 90 day disclosure deadline. If 90 days elapse
without an upstream patch, then the bug report will automatically
become visible to the public.

When you fix this bug, please
  * mention the fix revision(s).
  * state whether the bug was a short-lived regression or an old bug in any stable releases.
  * add any other useful information.
This information can help downstream consumers.

If you need to contact the OSS-Fuzz team with a question, concern, or any other feedback, please file an issue at https://github.com/google/oss-fuzz/issues.
 

Comment 1 by ClusterFuzz-External, Aug 14

Project Member
Labels: OS-Linux

Comment 2 by ClusterFuzz-External, Aug 16

Project Member
ClusterFuzz has detected this issue as fixed in range 201808150419:201808151715.

Detailed report: https://oss-fuzz.com/testcase?key=5754558830608384

Project: libreoffice
Fuzzer: libFuzzer_libreoffice_docxfuzzer
Fuzz target binary: docxfuzzer
Job Type: libfuzzer_ubsan_libreoffice
Platform Id: linux

Crash Type: Null-dereference WRITE
Crash Address: 0x00000000003c
Crash State:
  oox::drawingml::ShapeContext::onCreateContext
  oox::drawingml::ShapeContext::onCreateContext
  oox::core::ContextHandler2Helper::implCreateChildContext
  
Sanitizer: undefined (UBSAN)

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_ubsan_libreoffice&range=201807261958:201808110355
Fixed: https://oss-fuzz.com/revisions?job=libfuzzer_ubsan_libreoffice&range=201808150419:201808151715

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5754558830608384

See https://github.com/google/oss-fuzz/blob/master/docs/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.

Comment 3 by ClusterFuzz-External, Aug 16

Project Member
Labels: ClusterFuzz-Verified
Status: Verified (was: New)
ClusterFuzz testcase 5754558830608384 is verified as fixed, so closing issue as verified.

If this is incorrect, please file a bug on https://github.com/google/oss-fuzz/issues/new

Comment 4 by sheriffbot@chromium.org, Sep 15

Project Member
Labels: -restrict-view-commit
This bug has been fixed for 30 days. It has been opened to the public.

- Your friendly Sheriffbot

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