php:php-fuzz-mbstring: Heap-use-after-free in optimize_nodes

2020-01-22T20:27:53
ID OSSFUZZ-20301
Type ossfuzz
Reporter Google
Modified 2020-02-27T20:02:20

Description

Detailed Report: https://oss-fuzz.com/testcase?key=5688240959127552

Project: php Fuzzing Engine: libFuzzer Fuzz Target: php-fuzz-mbstring Job Type: libfuzzer_asan_i386_php Platform Id: linux

Crash Type: Heap-use-after-free READ 4 Crash Address: 0xf52376a0 Crash State: optimize_nodes optimize_nodes optimize_nodes

Sanitizer: address (ASAN)

Recommended Security Severity: High

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_asan_i386_php&range=202001210259:202001220303

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5688240959127552

Issue filed automatically.

See https://google.github.io/oss-fuzz/advanced-topics/reproducing for instructions to reproduce this bug locally. 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.

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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.