lz4:decompress_fuzzer: Heap-buffer-overflow in LZ4_decompress_safe_forceExtDict

2019-10-25T04:53:36
ID OSSFUZZ-18519
Type ossfuzz
Reporter Google
Modified 2020-01-23T18:26:37

Description

Project: https://github.com/lz4/lz4.git

Detailed Report: https://oss-fuzz.com/testcase?key=5204819744915456

Project: lz4 Fuzzing Engine: libFuzzer Fuzz Target: decompress_fuzzer Job Type: libfuzzer_asan_i386_lz4 Platform Id: linux

Crash Type: Heap-buffer-overflow WRITE {*} Crash Address: 0xf61020c9 Crash State: LZ4_decompress_safe_forceExtDict decompress_fuzzer.c

Sanitizer: address (ASAN)

Recommended Security Severity: High

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_asan_i386_lz4&range=201909090327:201909240342

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5204819744915456

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.