Flaw Fixed in Unix-like Systems

Apr 03, 2007

A file integer underflow vulnerability could be exploited to trigger buffer overflow in unpatched Unix-like systems.

A buffer overflow vulnerability caused by an integer underflow in the file_printf function in Unix-like operating systems has been patched.

The flaw is contained within the file program and could allow an attacker to execute arbitrary code or create a denial of service condition, according to a posting on the United States Computer Emergency Readiness Team's Web site.

File is a program used to determine what type of data is contained in a file. To trigger the overflow, a hacker would need to get a user to run a vulnerable version of file on a specially crafted file, the advisory states.

"Version 4.20 of file was released to address this issue," according to the US-CERT advisory.

If exploited, an attacker could execute malicious code with the permissions of the user running the vulnerable version of file or cause the program to crash, creating a denial-of-service condition.

Patches by Red Hat and Ubuntu were released more than a week ago for users of Red Hat Enterprise Linux 4 and 5 as well as Ubuntu 5.10, Ubuntu 6.06 LTS, Ubuntu 6.10 and corresponding versions of Kubuntu, Edubuntu, and Xubuntu. OpenWall GNU/*Linux and Mandriva have also released updates to address the issue.

In addition, running the file program with a limited user account may partially address the impact of a successful exploit of the flaw.

Copyright 2007 by Ziff Davis Media, Distributed by United Press International

Explore further: Detecting and blocking leaky Android apps

Related Stories

California farmers agree to drastically cut water use

3 hours ago

California farmers who hold some of the state's strongest water rights avoided the threat of deep mandatory cuts when the state accepted their proposal to voluntarily reduce consumption by 25 percent amid ...

Apple may deliver ways to rev up the iPad, report says

3 hours ago

MacRumors last month said that the latest numbers from market research firm IDC's Worldwide Quarterly Tablet Tracker revealed Apple stayed on as the largest vendor in a declining tablet market. The iPad ...

Recommended for you

Architects to hatch Ecocapsule as low-energy house

1 hour ago

Where people call home depends on varied factors, from poverty level to personal philosophy to vanity to community pressure. Ecocapsule appears to be the result of special factors, a team of architects applying ...

Apple may deliver ways to rev up the iPad, report says

5 hours ago

MacRumors last month said that the latest numbers from market research firm IDC's Worldwide Quarterly Tablet Tracker revealed Apple stayed on as the largest vendor in a declining tablet market. The iPad ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.