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.

References

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

https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html

Details

Risk Information

CVSS v2

CVSS v3