The ucnv_UTF8FromUTF8 function in ucnv_u8.cpp in International Components for Unicode (ICU) for C/C++ up to and including 60.1 mishandles ucnv_convertEx calls for UTF-8 to UTF-8 conversion, which allows remote malicious users to cause a denial of service (stack-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted string, as demonstrated by ZNC.
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icu-project international components for unicode |