{"id":"CVE-2017-17484","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-17484","generatedAt":"2026-10-28T21:57:41.021Z","title":"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…","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.","published":"2017-12-10T20:29:00.000Z","lastModified":"2026-06-17T01:10:52.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-119"],"affected":["icu-project/international components for unicode"],"epss":{"score":0.04481,"percentile":0.91418,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (4.48%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/znc/znc/issues/1459","tags":["Issue Tracking","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://ssl.icu-project.org/trac/attachment/ticket/13490/poc.cpp","tags":["Exploit","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://ssl.icu-project.org/trac/changeset/40714","tags":["Issue Tracking","Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://ssl.icu-project.org/trac/changeset/40715","tags":["Issue Tracking","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://ssl.icu-project.org/trac/ticket/13490","tags":["Issue Tracking","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://ssl.icu-project.org/trac/ticket/13510","tags":["Issue Tracking","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html","source":"cve@mitre.org"},{"url":"https://github.com/znc/znc/issues/1459","tags":["Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://ssl.icu-project.org/trac/attachment/ticket/13490/poc.cpp","tags":["Exploit","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://ssl.icu-project.org/trac/changeset/40714","tags":["Issue Tracking","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://ssl.icu-project.org/trac/changeset/40715","tags":["Issue Tracking","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://ssl.icu-project.org/trac/ticket/13490","tags":["Issue Tracking","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://ssl.icu-project.org/trac/ticket/13510","tags":["Issue Tracking","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-17484","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}