Microsoft fixes bugs in IIS -- again

On Tuesday, Microsoft issued yet another patch, this time for IIS version 4.0 (Service Pack 5 and higher) and version 5.0, which will protect against other DoS and takeover attacks, as well as correct problems created by other "fixes."

The new patch, available now at Microsoft's TechNet Web site, fixes three flaws in the IIS software. The first flaw allows an attacker to gain the ability to execute programs on the system by sending a certain sequence of packets of data, though it would not allow the attacker to gain administrator-level privileges. The second problem fixed in the update concerns an FTP (file transfer protocol) DoS which could cause the program to run out of memory, thus causing all connections to shut down. Finally, another issue with FTP services could have allowed an attacker to gain access to "Guest" accounts, though this vulnerability seems to be the most minor.

The new patch also fixes new flaws introduced by three Microsoft patches issued in August 2000 and March 2001. The fix offered by the August patch, Microsoft Security Bulletin MS00-060, had created conditions that would allow an attacker to slow down a system. Two fixes issued in March, MS01-014 and MS01-016, had created potential for a denial of service attack.

The first flaw in IIS was discovered by NSfocus Information Technology, a Chinese security firm. The two FTP issues were found by Lukasz Luzar of Developers.of.PL and Aiden ORawe. Kevin Kotas, of eSecurityOnline, a security portal, discovered the bugs created by the earlier patches.

The patch issued Tuesday is the third Microsoft has released for its server products in the first two weeks of May.

Two other patches were issued, fixing vulnerabilities in Windows 2000 Server and IIS 5.0 which could lead to the complete takeover of systems by an attacker or a DoS attack, respectively.

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Sam Costello

PC World
Show Comments

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Tom Pope

Dynabook Portégé X30L-G

Ultimately this laptop has achieved everything I would hope for in a laptop for work, while fitting that into a form factor and weight that is remarkable.

Tom Sellers

MSI P65

This smart laptop was enjoyable to use and great to work on – creating content was super simple.

Lolita Wang

MSI GT76

It really doesn’t get more “gaming laptop” than this.

Jack Jeffries

MSI GS75

As the Maserati or BMW of laptops, it would fit perfectly in the hands of a professional needing firepower under the hood, sophistication and class on the surface, and gaming prowess (sports mode if you will) in between.

Taylor Carr

MSI PS63

The MSI PS63 is an amazing laptop and I would definitely consider buying one in the future.

Christopher Low

Brother RJ-4230B

This small mobile printer is exactly what I need for invoicing and other jobs such as sending fellow tradesman details or step-by-step instructions that I can easily print off from my phone or the Web.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?