ICU vulnerabilities

An issue was discovered in certain Apple products, including iOS before 10.2, macOS before 10.12.2, and watchOS before 3.1.3, related to the 'ICU' component. It allows remote attackers to execute arbitrary code or cause a denial of service via a crafted website.

A stack buffer overflow was found in the International Components for Unicode (ICU) library when running the genrb binary. The vulnerability occurs in the SRBRoot::addTag function, where the 'subtag' struct overflows, potentially leading to memory corruption and local arbitrary code execution.

International Components for Unicode (ICU-20850) v66.1 was discovered to contain a use after free bug in the pkg_createWithAssemblyCode function in the file tools/pkgdata/pkgdata.cpp.

An issue was discovered in International Components for Unicode (ICU) for C/C++ through 66.1. An integer overflow, leading to a heap-based buffer overflow, exists in the UnicodeString::doAppend() function in common/unistr.cpp.

Integer overflow in international date handling in International Components for Unicode (ICU) for C/C++ before 60.1, as used in V8 in Google Chrome prior to 63.0.3239.84 and other products, allowed a remote attacker to perform an out of bounds memory read via a crafted HTML page.