fluent-bit:flb-it-fuzz-msgpack_to_gelf_fuzzer_OSSFUZZ: Heap-buffer-overflow in flb_msgpack_to_gelf

2020-09-18T21:43:21
ID OSSFUZZ-25780
Type ossfuzz
Reporter Google
Modified 2020-11-07T19:55:35

Description

Project: https://github.com/fluent/fluent-bit.git

Detailed Report: https://oss-fuzz.com/testcase?key=4785819234336768

Project: fluent-bit Fuzzing Engine: libFuzzer Fuzz Target: flb-it-fuzz-msgpack_to_gelf_fuzzer_OSSFUZZ Job Type: libfuzzer_asan_fluent-bit Platform Id: linux

Crash Type: Heap-buffer-overflow READ 4 Crash Address: 0x615000000511 Crash State: flb_msgpack_to_gelf flb_msgpack_raw_to_gelf msgpack_to_gelf_fuzzer.c

Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_asan_fluent-bit&range=202009100623:202009170628

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=4785819234336768

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.