CVE-2014-8146
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
ICU library 52 < 54 - Multiple Vulnerabilities
OS impact
macOS Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 52.1-9 |
| sid | Fixed | 52.1-9 |
| forky | Fixed | 52.1-9 |
| bullseye | Fixed | 52.1-9 |
| bookworm | Fixed | 52.1-9 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| apple | itunes | {"endIncluding":"12.1.3"} | |
| icu-project | international_components_for_unicode | {"endExcluding":"55.1"} | 55.1 |
References
- http://bugs.icu-project.org/trac/changeset/37162
- http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.html
- http://lists.apple.com/archives/security-announce/2015/Sep/msg00003.html
- 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/HT205212
- https://support.apple.com/HT205213
- https://support.apple.com/HT205221
- https://support.apple.com/HT205267
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://security-tracker.debian.org/tracker/CVE-2014-8146
CWEs
CWE-119
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.