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    CVE-2009-4492

    WEBrick 1.3.1 in Ruby 1.8.6 through patchlevel 383, 1.8.7 through patchlevel 248, 1.8.8dev, 1.9.1 through patchlevel 376, and 1.9.2dev writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.

    Published:Jan 11, 2010
    Last Modified:Apr 23, 2026
    EPS:Jan 13, 2010
    EPSS Score:0.17685
    CVSS Score:7.5

    Affected Products

    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Ruby-lang
    Product
    Ruby
    Vendor
    Ruby-lang
    Product
    Webrick

    Exploits

    http://securitytracker.com/id?1023429http://www.securityfocus.com/bid/37710http://www.ush.it/team/ush/hack_httpd_escape/adv.txthttp://securitytracker.com/id?1023429http://www.securityfocus.com/bid/37710http://www.ush.it/team/ush/hack_httpd_escape/adv.txthttps://www.exploit-db.com/exploits/33489

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://secunia.com/advisories/37949
    http://securitytracker.com/id?1023429
    http://www.redhat.com/support/errata/RHSA-2011-0908.html
    http://www.redhat.com/support/errata/RHSA-2011-0909.html
    http://www.ruby-lang.org/en/news/2010/01/10/webrick-escape-sequence-injection
    http://www.securityfocus.com/archive/1/508830/100/0/threaded
    http://www.securityfocus.com/bid/37710
    http://www.ush.it/team/ush/hack_httpd_escape/adv.txt
    http://www.vupen.com/english/advisories/2010/0089
    http://secunia.com/advisories/37949
    http://securitytracker.com/id?1023429
    http://www.redhat.com/support/errata/RHSA-2011-0908.html
    http://www.redhat.com/support/errata/RHSA-2011-0909.html
    http://www.ruby-lang.org/en/news/2010/01/10/webrick-escape-sequence-injection
    http://www.securityfocus.com/archive/1/508830/100/0/threaded
    http://www.securityfocus.com/bid/37710
    http://www.ush.it/team/ush/hack_httpd_escape/adv.txt
    http://www.vupen.com/english/advisories/2010/0089

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High