Vulnerability CVE-2014-8147
Published: 2015-05-25   Modified: 2015-05-26

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.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
ICU Heap / Integer Overflows
Pedro Ribeiro
06.05.2015
Med.
ICU library 52 < 54 Multiple Vulnerabilities
Agile
26.01.2018

Type:

CWE-189

 (Numeric Errors)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Icu project -> International components for unicode 
Icu-project -> International components for unicode 
Apple -> Mac os x 
Apple -> Watchos 

 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://raw.githubusercontent.com/pedrib/PoC/master/generic/i-c-u-fail.txt
https://security.gentoo.org/glsa/201507-04
https://support.apple.com/HT205213
https://support.apple.com/HT205267
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
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