THREATPORT/VULNERABILITY/CVE-2017-17484
CRITICAL SEVERITY

CVE-2017-17484

International Components For Unicode vulnerability

CVSS
9.8
EPSS
4.6%
EPSS pct
91th
Exploited
No known
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.
Affected vendor
Icu Project
Affected product
International Components For Unicode
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-119 — Improper Restriction of Operations within Memory Bounds
Published
2017-12-10

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 4.6% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 91% of all scored CVEs.

Check your external exposure to CVE-2017-17484

  • Confirm whether Icu Project International Components For Unicode is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2017-17484.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-17484

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2017-17484 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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