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Issue metadata

Status: Fixed
Owner:
Closed: May 2017
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Mac
Pri: ----
Type: Bug-Security

Blocking:
issue 62400



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Heap-buffer-overflow in CGifLZWDecoder::ClearTable

Project Member Reported by ClusterFuzz, Mar 2 2017

Issue description

Comment 1 by vakh@chromium.org, Mar 2 2017

Cc: tsepez@chromium.org
Components: Internals>Plugins>PDF
Owner: dsinclair@chromium.org
Status: Assigned (was: Untriaged)
Blocking: 62400
Labels: -Security_Impact-Head Security_Impact-None
XFA is not enabled on any branch of chrome.
Project Member

Comment 3 by ClusterFuzz, Mar 28 2017

Labels: OS-Mac
Project Member

Comment 4 by ClusterFuzz, May 11 2017

ClusterFuzz has detected this issue as fixed in range 470448:470492.

Detailed report: https://clusterfuzz.com/testcase?key=4796643456319488

Fuzzer: libfuzzer_pdf_codec_gif_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Heap-buffer-overflow WRITE 1
Crash Address: 0x62a000005232
Crash State:
  CGifLZWDecoder::ClearTable
  gif_load_frame
  CCodec_GifModule::LoadFrame
  
Sanitizer: address (ASAN)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=423381:423433
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=470448:470492

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4796643456319488


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 5 by ClusterFuzz, May 11 2017

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 4796643456319488 is verified as fixed, so closing issue.

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

Comment 6 by sheriffbot@chromium.org, May 11 2017

Labels: -Restrict-View-SecurityTeam Restrict-View-SecurityNotify
Labels: ClusterFuzz-Wrong
Status: Available (was: Verified)
Don't see any reason this should be fixed, we should verify.
Project Member

Comment 8 by sheriffbot@chromium.org, May 16 2017

Status: Assigned (was: Available)
Cc: dsinclair@chromium.org
Owner: npm@chromium.org

Comment 10 by npm@chromium.org, May 19 2017

Status: Fixed (was: Assigned)
This has been fixed by recent gif CLs.
Project Member

Comment 11 by sheriffbot@chromium.org, Aug 26 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
Labels: -ClusterFuzz-Wrong
We have made a bunch of changes on ClusterFuzz side, so resetting ClusterFuzz-Wrong label.

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