cve/2017/CVE-2017-17484.md

### [CVE-2017-17484](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-17484)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

The ucnv_UTF8FromUTF8 function in ucnv_u8.cpp in International Components for Unicode (ICU) for C/C++ through 60.1 mishandles ucnv_convertEx calls for UTF-8 to UTF-8 conversion, which allows remote attackers 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.

### POC

#### Reference
- https://github.com/znc/znc/issues/1459
- https://ssl.icu-project.org/trac/attachment/ticket/13490/poc.cpp
- https://ssl.icu-project.org/trac/changeset/40714
- https://ssl.icu-project.org/trac/changeset/40715
- https://ssl.icu-project.org/trac/ticket/13490
- https://ssl.icu-project.org/trac/ticket/13510

#### Github
No PoCs found on GitHub currently.