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 does not properly track directionally isolated pieces of text, which allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly execute arbitrary code via crafted text.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- https://support.apple.com/HT205221 ↗
- https://raw.githubusercontent.com/pedrib/PoC/master/generic/i-c-u-fail.txt ↗
- http://bugs.icu-project.org/trac/changeset/37162 ↗
- https://support.apple.com/HT205212 ↗
- http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html ↗
- http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html ↗
- https://security.gentoo.org/glsa/201507-04 ↗
- http://www.kb.cert.org/vuls/id/602540 ↗
- https://support.apple.com/HT205267 ↗
- http://seclists.org/fulldisclosure/2015/May/14 ↗
- http://lists.apple.com/archives/security-announce/2015/Sep/msg00005.html ↗
- http://lists.apple.com/archives/security-announce/2015/Sep/msg00003.html ↗
- http://openwall.com/lists/oss-security/2015/05/05/6 ↗
- https://support.apple.com/HT205213 ↗
- http://www.securityfocus.com/bid/74457 ↗
- http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.html ↗
- http://www.debian.org/security/2015/dsa-3323 ↗
- http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html ↗
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html ↗