Secunia Research: Opera Command Line URL Shell Command Injection

From: Secunia Research (vuln_at_secunia.com)
Date: 11/22/05

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    To: vuln@secunia.com
Date: Tue, 22 Nov 2005 10:40:01 +0100

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                         Secunia Research 22/11/2005

             - Opera Command Line URL Shell Command Injection -

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    Table of Contents

    Affected Software....................................................1
    Severity.............................................................2
    Description of Vulnerability.........................................3
    Solution.............................................................4
    Time Table...........................................................5
    Credits..............................................................6
    References...........................................................7
    About Secunia........................................................8
    Verification.........................................................9

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    1) Affected Software

    Opera 8.x on Unix / Linux based environments.

    Prior versions may also be affected.

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    2) Severity

    Rating: Highly Critical
    Impact: System access
    Where: Remote

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    3) Description of Vulnerability

    Secunia Research has discovered a vulnerability in Opera, which can
    be exploited by malicious people to compromise a user's system.

    The vulnerability is caused due to the shell script used to launch
    Opera parsing shell commands that are enclosed within backticks in
    the URL provided via the command line. This can e.g. be exploited to
    execute arbitrary shell commands by tricking a user into following a
    malicious link in an external application which uses Opera as the
    default browser (e.g. the mail client Evolution on Red Hat Enterprise
    Linux 4).

    This vulnerability can only be exploited on Unix / Linux based
    environments.

    This vulnerability is a variant of:
    http://secunia.com/SA16869

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    4) Solution

    Update to version 8.51.
    http://www.opera.com/download/

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    5) Time Table

    22/09/2005 - Initial vendor notification.
    22/09/2005 - Initial vendor reply.
    22/11/2005 - Vendor released patches.
    22/11/2005 - Public disclosure.

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    6) Credits

    Originally discovered by:
    Peter Zelezny

    Discovered in Opera by:
    Jakob Balle, Secunia Research

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    7) References

    Secunia Advisory SA16869:
    http://secunia.com/advisories/16869/

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    8) About Secunia

    Secunia collects, validates, assesses, and writes advisories regarding
    all the latest software vulnerabilities disclosed to the public. These
    advisories are gathered in a publicly available database at the
    Secunia website:

    http://secunia.com/

    Secunia offers services to our customers enabling them to receive all
    relevant vulnerability information to their specific system
    configuration.

    Secunia offers a FREE mailing list called Secunia Security Advisories:

    http://secunia.com/secunia_security_advisories/

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    9) Verification

    Please verify this advisory by visiting the Secunia website:
    http://secunia.com/secunia_research/2005-57/advisory/

    Complete list of vulnerability reports published by Secunia Research:
    http://secunia.com/secunia_research/

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