Unix/Linux Bash: Critical security hole uncovered

    Date24 Sep 2014
    CategoryHacks/Cracks
    2716
    Posted ByDave Wreski
    The flaw involves how Bash evaluates environment variables. With specifically crafted variables, a hacker could use this hole to execute shell commands. This, in turn, could render a server vulnerable to ever greater assaults. By itself, this is one of those security holes where an attacker would already need to have a high level of system access to cause damage. Unfortunately, as Red Hat's security team put it, "Certain services and applications allow remote unauthenticated attackers to provide environment variables, allowing them to exploit this issue."
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With specifically crafted variables, a hacker could use this hole to execute shell commands. This, in turn, could render a server vulnerable to ever greater assaults. [fulltext] => By itself, this is one of those security holes where an attacker would already need to have a high level of system access to cause damage. Unfortunately, as Red Hat's security team put it, "Certain services and applications allow remote unauthenticated attackers to provide environment variables, allowing them to exploit this issue." 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