CVE-2017-17484 Information

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8