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Vulnerability record · CVE-2017-17484 · published 10 December 2017

CVE-2017-17484: Icu-project international components for unicode memory buffer overflow vulnerability

Icu Project · International Components For Unicode

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.

9.8 CVSS 3.0 Critical EPSS 4.6% · top 8.7% CWE-119 · Memory buffer overflow
9.8CVSS 3.0 base score, v2 7.5
4.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
14References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/znc/znc/issues/1459 Issue TrackingThird Party Advisory
https://ssl.icu-project.org/trac/attachment/ticket/13490/poc.cpp ExploitVendor Advisory
https://ssl.icu-project.org/trac/changeset/40714 Issue TrackingPatchVendor Advisory
https://ssl.icu-project.org/trac/changeset/40715 Issue TrackingVendor Advisory
https://ssl.icu-project.org/trac/ticket/13490 Issue TrackingVendor Advisory
https://ssl.icu-project.org/trac/ticket/13510 Issue TrackingVendor Advisory
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://github.com/znc/znc/issues/1459 Issue TrackingThird Party Advisory
https://ssl.icu-project.org/trac/attachment/ticket/13490/poc.cpp ExploitVendor Advisory
https://ssl.icu-project.org/trac/changeset/40714 Issue TrackingPatchVendor Advisory
https://ssl.icu-project.org/trac/changeset/40715 Issue TrackingVendor Advisory
https://ssl.icu-project.org/trac/ticket/13490 Issue TrackingVendor Advisory
https://ssl.icu-project.org/trac/ticket/13510 Issue TrackingVendor Advisory
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2015-5922Apple mac os x vulnerabilityUnspecified vulnerability in International Components for Unicode (ICU) before 53.1.0, as used in Apple OS X before 10.11 and watchOS before 2, has u…EPSS 3.0%9.8CVE-2018-18928Icu-project international components for unicode integer overflow vulnerabilityInternational Components for Unicode (ICU) for C/C++ 63.1 has an integer overflow in number::impl::DecimalQuantity::toScientificString() in i18n/numb…EPSS 2.9%9.8CVE-2017-14952Icu-project international components for unicode double free vulnerabilityDouble free in i18n/zonemeta.cpp in International Components for Unicode (ICU) for C/C++ through 59.1 allows remote attackers to execute arbitrary co…EPSS 5.1%9.8CVE-2014-9654Google chrome memory buffer overflow vulnerabilityThe Regular Expressions package in International Components for Unicode (ICU) for C/C++ before 2014-12-03, as used in Google Chrome before 40.0.2214.…EPSS 2.4%9.8CVE-2014-9911Icu-project international components for unicode memory buffer overflow vulnerabilityStack-based buffer overflow in the ures_getByKeyWithFallback function in common/uresbund.cpp in International Components for Unicode (ICU) before 54.…EPSS 5.5%9.8CVE-2016-7415Icu-project international components for unicode memory buffer overflow vulnerabilityStack-based buffer overflow in the Locale class in common/locid.cpp in International Components for Unicode (ICU) through 57.1 for C/C++ allows remot…EPSS 5.8%9.8CVE-2016-6293Icu-project international components for unicode memory buffer overflow vulnerabilityThe uloc_acceptLanguageFromHTTP function in common/uloc.cpp in International Components for Unicode (ICU) through 57.1 for C/C++ does not ensure that…EPSS 5.0%9.3CVE-2007-4771Icu-project international components for unicode vulnerabilityHeap-based buffer overflow in the doInterval function in regexcmp.cpp in libicu in International Components for Unicode (ICU) 3.8.1 and earlier allow…EPSS 2.5%

Source: NIST National Vulnerability Database (record CVE-2017-17484), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.