Microsoft fixes Exchange flaw
A patch for a security hole dubbed 'moderate' has been issued by the software firm
Microsoft published a patch on Tuesday for its Exchange 5.5 email and collaboration server software, fixing a flaw graded as "moderate," the second-lowest of four ratings.
The vulnerability revealed in Tuesday's advisory could be exploited to target people using the Web email component for Exchange, called Outlook Web Access, Microsoft said. An attacker with an account on a company's Exchange server could create a script that, when run by an OWA user on the same server, would give access to the victim's email boxes and information.
The flaw also allows the malicious programmer to place spoofed content, such as fake graphics and Web pages, in the server's cache of Web content.
The vulnerability is not easy to exploit, said Stephen Toulouse, a security program manager at Microsoft, citing several preconditions to making an attack work.
"The attacker would have to have an account, and the user would have to allow access," he said.
