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CVE-2016-3861

Status Candidate

Overview

LibUtils in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, 6.x before 2016-09-01, and 7.0 before 2016-09-01 mishandles conversions between Unicode character encodings with different encoding widths, which allows remote attackers to execute arbitrary code or cause a denial of service (heap-based buffer overflow) via a crafted file, aka internal bug 29250543.

Related Files

Android libutils Heap Buffer Overflow
Posted Sep 8, 2016
Authored by Google Security Research, Mark Brand

Android suffers from an inconsistency between the way that the two functions in libutils/Unicode.cpp handle invalid surrogate pairs in UTF16, resulting in a mismatch between the size calculated by utf16_to_utf8_length and the number of bytes written by utf16_to_utf8. This results in a heap buffer overflow.

tags | exploit, overflow
advisories | CVE-2016-3861
SHA-256 | 96cc80081d5dd685082f852a3e7f67d2a383203aa882b75afb5e24b6591cb0a8
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