qpdf:dct_fuzzer: Use-of-uninitialized-value in ycck_cmyk_convert

Type ossfuzz
Reporter Google
Modified 2020-10-23T14:34:44


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

Detailed Report: https://oss-fuzz.com/testcase?key=5646580451639296

Project: qpdf Fuzzing Engine: libFuzzer Fuzz Target: dct_fuzzer Job Type: libfuzzer_msan_qpdf Platform Id: linux

Crash Type: Use-of-uninitialized-value Crash Address: Crash State: ycck_cmyk_convert sep_upsample process_data_simple_main

Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_msan_qpdf&range=201906230314:201906240315

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5646580451639296

Issue filed automatically.

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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.