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CVE-2017-17484

31
FAUCET Score

CVE-2017-17484 describes a stack-based buffer overflow vulnerability in the ucnv_UTF8FromUTF8 function within International Components for Unicode (ICU) for C/C++ through version 60.1. This critical vulnerability, rated 9.8 CVSS, allows remote attackers to cause a denial of service and potentially other unspecified impacts by sending a crafted string during UTF-8 to UTF-8 conversion. While no active exploitation, public exploit code, or significant community discussion has been observed, the high severity indicates a significant risk if exploited.

Impacted Technologies

VendorProductVersion(s)CPE
<= 60.1CPE matchmatch criteria
cpe:2.3:a:icu-project:international_components_for_unicode:*:*:*:*:*:c\/c\+\+:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.61%
Probability of exploitation in next 30 days
EPSS Percentile
90.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0461 is in the 84th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2017-17484Moderate

icu: stack-based buffer overflow in ucnv_u8.cpp:ucnv_UTF8FromUTF8 can lead to denial of service

Nov 21, 2017

References

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