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.
Exploits (1)
References (16)
Core 16
Core References
Exploit x_refsource_misc
https://raw.githubusercontent.com/pedrib/PoC/master/generic/i-c-u-fail.txt
Mailing List vendor-advisory
x_refsource_apple
http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
Patch x_refsource_confirm
http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/201507-04
Third Party Advisory, US Government Resource third-party-advisory
x_refsource_cert-vn
http://www.kb.cert.org/vuls/id/602540
Third Party Advisory x_refsource_confirm
https://support.apple.com/HT205267
Exploit, Mailing List, Third Party Advisory mailing-list
x_refsource_fulldisc
http://seclists.org/fulldisclosure/2015/May/14
Mailing List vendor-advisory
x_refsource_apple
http://lists.apple.com/archives/security-announce/2015/Sep/msg00005.html
Mailing List mailing-list
x_refsource_mlist
http://openwall.com/lists/oss-security/2015/05/05/6
Third Party Advisory x_refsource_confirm
https://support.apple.com/HT205213
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/74457
Third Party Advisory vendor-advisory
x_refsource_debian
http://www.debian.org/security/2015/dsa-3323
Issue Tracking, Vendor Advisory x_refsource_confirm
http://bugs.icu-project.org/trac/changeset/37080
Third Party Advisory x_refsource_confirm
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
Vendor Advisory x_refsource_misc
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
Mailing List mailing-list
x_refsource_mlist
https://lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b6673f4fd5583d5fe%40%3Ccommits.druid.apache.org%3E
Scores
EPSS
0.4190
EPSS Percentile
97.4%
Details
CWE
CWE-189
Status
published
Products (3)
apple/mac_os_x
< 10.10.4
apple/watchos
< 1.0.1
icu-project/international_components_for_unicode
< 55.1
Published
May 25, 2015
Tracked Since
Feb 18, 2026