Will Drewry discovered that libicu did not properly handle ‘\0’ when processing regular expressions. If an application linked against libicu processed a crafted regular expression, an attacker could execute arbitrary code with privileges of the user invoking the program. (CVE-2007-4770)
Will Drewry discovered that libicu did not properly limit its backtracking stack size. If an application linked against libicu processed a crafted regular expression, an attacker could cause a denial of service via resource exhaustion. (CVE-2007-4771)
24 March 2008
A security issue affects these releases of Ubuntu and its derivatives:
Will Drewry discovered that libicu did not properly handle ‘\0’ when processing regular expressions. If an application linked against libicu processed a crafted regular expression, an attacker could execute arbitrary code with privileges of the user invoking the program. (CVE-2007-4770)
Will Drewry discovered that libicu did not properly limit its backtracking stack size. If an application linked against libicu processed a crafted regular expression, an attacker could cause a denial of service via resource exhaustion. (CVE-2007-4771)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system upgrade you need to restart applications linked against libicu, such as OpenOffice.org, to effect the necessary changes.
Vulmon