imagemagick:encoder_heic_fuzzer: Heap-buffer-overflow in derive_collocated_motion_vectors

2020-05-12T09:22:11
ID OSSFUZZ-22170
Type ossfuzz
Reporter Google
Modified 2020-08-10T20:01:41

Description

Detailed Report: https://oss-fuzz.com/testcase?key=5706473062793216

Project: imagemagick Fuzzing Engine: libFuzzer Fuzz Target: encoder_heic_fuzzer Job Type: libfuzzer_asan_imagemagick Platform Id: linux

Crash Type: Heap-buffer-overflow READ 1 Crash Address: 0x61b00001db3c Crash State: derive_collocated_motion_vectors derive_temporal_luma_vector_prediction fill_luma_motion_vector_predictors

Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Crash Revision: https://oss-fuzz.com/revisions?job=libfuzzer_asan_imagemagick&revision=202005120138

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5706473062793216

Issue filed automatically.

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

**** UNREPRODUCIBLE **** Note: This crash might not be reproducible with the provided testcase. That said, for the past 14 days, we've been seeing this crash frequently.

It may be possible to reproduce by trying the following options: - Run testcase multiple times for a longer duration. - Run fuzzing without testcase argument to hit the same crash signature.

If it still does not reproduce, try a speculative fix based on the crash stacktrace and verify if it works by looking at the crash statistics in the report. We will auto-close the bug if the crash is not seen for 14 days.


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.