libspng:spng_read_fuzzer: Use-of-uninitialized-value in read_non_idat_chunks

2020-05-27T19:13:59
ID OSSFUZZ-22646
Type ossfuzz
Reporter Google
Modified 2020-06-30T20:03:40

Description

Project: https://gitlab.com/randy408/libspng.git https://github.com/randy408/libspng.git

Detailed Report: https://oss-fuzz.com/testcase?key=5674795839782912

Project: libspng Fuzzing Engine: libFuzzer Fuzz Target: spng_read_fuzzer Job Type: libfuzzer_msan_libspng Platform Id: linux

Crash Type: Use-of-uninitialized-value Crash Address: Crash State: read_non_idat_chunks read_chunks spng_get_plte

Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_msan_libspng&range=202005260556:202005270235

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5674795839782912

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.