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    Home Cybersecurity
    • Cybersecurity

    Flaw Fixed in Unix-like Systems

    By
    Brian Prince
    -
    April 2, 2007
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      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 Teams 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.

      Check out eWEEK.coms Security Center for the latest security news, reviews and analysis. And for insights on security coverage around the Web, take a look at eWEEKs Security Watch blog.

      Brian Prince

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