USN-591-1: libicu vulnerabilities

Releases

• Ubuntu 7.10
• Ubuntu 7.04
• Ubuntu 6.10
• Ubuntu 6.06

Packages

• icu -

Details

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)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 7.10

• libicu36 - 3.6-3ubuntu0.1

Ubuntu 7.04

• libicu36 - 3.6-2ubuntu0.1

Ubuntu 6.10

• libicu34 - 3.4.1a-1ubuntu1.6.10.1

Ubuntu 6.06

• libicu34 - 3.4.1a-1ubuntu1.6.06.1

After a standard system upgrade you need to restart applications linked
against libicu, such as OpenOffice.org, to effect the necessary changes.

References

• CVE-2007-4770
• CVE-2007-4771