Vulnerability CVE-2017-17484
Published: 2017-12-10

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.

Type:

CWE-119

 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Icu project -> International components for unicode 
Icu-project -> International components for unicode 

 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
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