CVE-2017-17484
9.8
CRITICAL · CVSS 3.0 · EPSS 4.5% (pctl 91)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 4.48% — more likely to be exploited than 91% of all CVEs |
| Weakness | CWE-119 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2017-12-10 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| 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
- 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
→ the Explorer · watch your stack · NVD