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    New Vulnerability Found in CDE

    By
    Dennis Fisher
    -
    October 8, 2001
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      Security researchers have found a vulnerability in a popular Unix GUI program that could enable an attacker to gain root privileges on a victims computer.

      The problem stems from a format string vulnerability in the Common Desktop Environment, an open-source GUI that runs on Unix and Linux operating systems.

      Specifically, the ToolTalk message brokering services RPC (Remote Procedure Call) database server—a component of the CDE—mishandles a certain error condition.

      As such, an attacker can craft an RPC request that can cause the specific error condition. He could then overwrite portions of the victims machines memory, enabling him to execute code with the privileges of the RPC database server, which is typically root, according to a CERT advisory on the flaw.

      The vulnerability, which was discovered by Internet Security Systems Inc.s X-Force research team, affects numerous versions of Unix and Linux, including Caldera Inc.s UnixWare and Open Linux and IBMs AIX 4.3 and 5.1. For a complete list of the vulnerable Unix and Linux implementations, see the CERT advisory at www.cert.org.

      Many of the affected vendors have already released patches and the others are working on them.

      Dennis Fisher

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