CVE-2017-17484

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 v3.0 NVD

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

CVSS v2.0 NVD

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

4.48% chance of exploitation in the next 30 days, 91st percentile

Published

2017-12-10

Updated

2024-08-05

Proof-of-concept exploits (1)

• https://ssl.icu-project.org/trac/attachment/ticket/13490/poc.cpp

Security advisories

• 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
• znc/znc/issues/1459
• https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html

References

• CVE Record
• NVD entry