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.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2014-8146 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 1.2 |
|---|---|
| Base Metrics | AV:L/AC:H/Au:N/C:N/I:N/A:P |
| Access Vector | Local |
| Access Complexity | High |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat OpenShift Enterprise 2 | icu | Will not fix |
| Red Hat Enterprise Linux 7 | icu | Will not fix |
| Red Hat Enterprise Linux 6 | icu | Will not fix |
| Red Hat Enterprise Linux 5 | icu | Will not fix |
| Red Hat Directory Server 8 | icu | Will not fix |
Vulmon