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CVE-2017-17484

9.8 · CRITICAL

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…

Published Dec 10, 2017CWE-119EPSS 4.48%

Overview

CVE-2017-17484 is a critical-severity vulnerability. It was published on December 10, 2017 and has a CVSS 3.0 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.0 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/znc/znc/issues/1459Refssl.icu-project.org/trac/attachment/ticket/13490/poc.cppRefssl.icu-project.org/trac/changeset/40714Refssl.icu-project.org/trac/changeset/40715Refssl.icu-project.org/trac/ticket/13490Refssl.icu-project.org/trac/ticket/13510Refwww.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlGitHubgithub.com/znc/znc/issues/1459Refssl.icu-project.org/trac/attachment/ticket/13490/poc.cppRefssl.icu-project.org/trac/changeset/40714

How CyberStrike helps

Frequently asked questions

What is CVE-2017-17484?

CVE-2017-17484 is a critical-severity vulnerability. It was published on December 10, 2017 and has a CVSS 3.0 base score of 9.8 (CRITICAL).

How severe is CVE-2017-17484?

This vulnerability has a CVSS 3.0 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-17484?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-17484?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-17484 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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