SB2015052809 - Improper input validation in icu (Alpine package)

Description

This security bulletin contains information about 1 security vulnerability.

1) Improper input validation (CVE-ID: CVE-2014-8147)

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The vulnerability exists due to the resolveImplicitLevels function in common/ubidi.c in the Unicode Bidirectional Algorithm implementation in ICU4C uses an integer data type that is inconsistent with a header file. A remote unauthenticated attacker can supply specially crafted text file, trigger incorrect malloc followed by invalid free and cause the service to crash or execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://git.alpinelinux.org/aports/commit/?id=cd87def91c8313b273996323459f047b80464c3f
• https://git.alpinelinux.org/aports/commit/?id=3525b0ef592aad9d320f5834662190482def7d1b
• https://git.alpinelinux.org/aports/commit/?id=ba0d9dbb245e1b1c8513f7c256ac31205db8f7ba