libchewing: Heap-buffer-overflow in ueStrNBytes

2016-11-21T10:58:59
ID OSSFUZZ-203
Type ossfuzz
Reporter Google
Modified 2017-05-16T08:50:35

Description

Project: https://github.com/chewing/libchewing.git

Detailed report: https://clusterfuzz-external.appspot.com/testcase?key=6274152528871424

Target: libchewing Fuzzer: libFuzzer_libchewing_chewing_random_init_fuzzer Fuzzer binary: chewing_random_init_fuzzer Job Type: libfuzzer_asan_libchewing Platform Id: linux

Crash Type: Heap-buffer-overflow READ 1 Crash Address: 0x60300001dd84 Crash State: ueStrNBytes ueStrNCpy SetChoiceInfo

Recommended Security Severity: Medium

Regressed: https://clusterfuzz-external.appspot.com/revisions?job=libfuzzer_asan_libchewing&range=201610201020:201610201348

Minimized Testcase (5.20 Kb): https://clusterfuzz-external.appspot.com/download/AMIfv97BfpkuzY5WVyVeAgjUlVTClPpCuYCdtwVJxx_dUdq2z1eeQ95BKrhDjexBwne6nNCy7h_PjueJZDePtPYTVCS2AUjwXG4gsUMCv82G83PaEmGcVLD57WKNNfBjkh8gKUqCMm6GrE3SPO_xI_p9PA0QcN2jJqt4YWQCnW2uNltQ-DIGX0E?testcase_id=6274152528871424

Issue filed automatically.

See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md for more information.