Linux vendors rush out e-mail server patches

Several major Linux vendors have warned they are vulnerable to four flaws in a widely used IMAP e-mail server from Carnegie Mellon University's Cyrus Electronic Mail Project. The flaws could allow an attacker to take over a server.

Among the Linux vendors issuing patches for the Cyrus IMAP server are MandrakeSoft, Gentoo and Debian. IMAP (Internet Message Access Protocol) is one of the most popular standards for accessing e-mail, and the Cyrus software is designed for use by small to large enterprises.

Stefan Esser of e-matters notified the Cyrus IMAP team of the flaws early this month, and a patch was released last week, the security firm said. Public disclosure followed on Monday, and Linux vendors have released patches during the week. E-matters said it wouldn't publicly release technical details of the flaws in order to make exploitation more difficult.

Esser discovered the four bugs during an audit of the Cyrus component, called cyrus-imapd. The bugs comprise a standard stack overflow, out of bounds memory corruptions in two commands, and the use of a programming construct that is undefined according to the C standard, Esser said in an advisory. All four could be exploited to run malicious code on a server, although some take more skill to exploit than others, Esser said.

Danish security firm Secunia, which maintains a vulnerability database, gave the flaw its second most serious rating.

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.

Matthew Broersma

Techworld
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?