International Components for Unicode: Multiple vulnerabilities — GLSA 200803-20

Two vulnerabilities have been discovered in the International Components for Unicode, possibly resulting in the remote execution of arbitrary code or a Denial of Service.

Affected Packages

dev-libs/icu on all architectures
Affected versions < 3.8.1-r1
Unaffected versions >= 3.8.1-r1, revision >= 3.6-r2

Background

International Components for Unicode is a set of C/C++ and Java libraries providing Unicode and Globalization support for software applications.

Description

Will Drewry (Google Security) reported a vulnerability in the regular expression engine when using back references to capture \0 characters (CVE-2007-4770). He also found that the backtracking stack size is not limited, possibly allowing for a heap-based buffer overflow (CVE-2007-4771).

Impact

A remote attacker could submit specially crafted regular expressions to an application using the library, possibly resulting in the remote execution of arbitrary code with the privileges of the user running the application or a Denial of Service.

Workaround

There is no known workaround at this time.

Resolution

All International Components for Unicode users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=dev-libs/icu-3.8.1-r1"

References

Release Date
March 11, 2008

Latest Revision
May 28, 2009: 03

Severity
high

Exploitable
remote

Bugzilla entries