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Issue 716519 link

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Issue metadata

Status: Fixed
Owner:
Closed: Apr 2017
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: ----
Type: Bug-Security



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Heap-use-after-free in CFX_WideString::operator

Project Member Reported by ClusterFuzz, Apr 28 2017

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5200879511928832

Fuzzer: libfuzzer_pdf_fm2js_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Heap-use-after-free READ 4
Crash Address: 0x7f3836b5350c
Crash State:
  CFX_WideString::operator
  CXFA_FMStringExpression::ToJavaScript
  CXFA_FMExpExpression::ToJavaScript
  
Sanitizer: address (ASAN)

Recommended Security Severity: High

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5200879511928832


Issue filed automatically.

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

Comment 1 by tsepez@chromium.org, Apr 28 2017

Owner: tsepez@chromium.org
Status: Assigned (was: Untriaged)

Comment 2 by tsepez@chromium.org, Apr 28 2017

Labels: -Security_Impact-Stable Security_Impact-None
XFA -> sev none.

Comment 4 by tsepez@chromium.org, Apr 28 2017

Status: Fixed (was: Assigned)
Project Member

Comment 5 by ClusterFuzz, Apr 29 2017

ClusterFuzz has detected this issue as fixed in range 468168:468204.

Detailed report: https://clusterfuzz.com/testcase?key=5200879511928832

Fuzzer: libfuzzer_pdf_fm2js_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Heap-use-after-free READ 4
Crash Address: 0x7f3836b5350c
Crash State:
  CFX_WideString::operator
  CXFA_FMStringExpression::ToJavaScript
  CXFA_FMExpExpression::ToJavaScript
  
Sanitizer: address (ASAN)

Recommended Security Severity: High

Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=468168:468204

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5200879511928832


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 6 by sheriffbot@chromium.org, Apr 29 2017

Labels: -Restrict-View-SecurityTeam Restrict-View-SecurityNotify
Components: Internals>Plugins>PDF
Project Member

Comment 8 by sheriffbot@chromium.org, Aug 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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