What’s Vulnerable › Vulnerabilities

CVE-2014-8147

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 23.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2015-05-25 · updated 2026-06-17
• Weakness: CWE-189

Description

The resolveImplicitLevels function in common/ubidi.c in the Unicode Bidirectional Algorithm implementation in ICU4C in International Components for Unicode (ICU) before 55.1 uses an integer data type that is inconsistent with a header file, which allows remote attackers to cause a denial of service (incorrect malloc followed by invalid free) or possibly execute arbitrary code via crafted text.

Affected products

• macOS: through 10.10.4
• Apple watchOS: through 1.0.1
• Icu-Project International Components For Unicode: before 55.1 — fixed in 55.1

How to fix

Upgrade to a fixed version: Icu-Project International Components For Unicode 55.1. Check the vendor advisory for mitigations.

References

• http://bugs.icu-project.org/trac/changeset/37080
• http://lists.apple.com/archives/security-announce/2015/Sep/msg00005.html
• http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
• http://openwall.com/lists/oss-security/2015/05/05/6
• http://seclists.org/fulldisclosure/2015/May/14
• http://www.debian.org/security/2015/dsa-3323
• http://www.kb.cert.org/vuls/id/602540
• http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
• http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
• http://www.securityfocus.com/bid/74457
• https://lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b6673f4fd5583d5fe%40%3Ccommits.druid.apache.org%3E
• https://raw.githubusercontent.com/pedrib/PoC/master/generic/i-c-u-fail.txt

Get alerted when CVE-2014-8147 or the next vulnerability affects your stack