CVE-2011-3639

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    CVE-2011-3639

    Published: 30 Nov 2011Last Modified: 10 Apr 2026

    Summary:

    Details: The mod_proxy module in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x before 2.2.18, when the Revision 1179239 patch is in place, does not properly interact with use of (1) RewriteRule and (2) ProxyPassMatch pattern matches for configuration of a reverse proxy, which allows remote attackers to send requests to intranet servers by using the HTTP/0.9 protocol with a malformed URI containing an initial @ (at sign) character. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-3368.

    References: http://rhn.redhat.com/errata/RHSA-2012-0128.html, http://www.debian.org/security/2012/dsa-2405, https://bugzilla.redhat.com/show_bug.cgi?id=752080, http://svn.apache.org/viewvc?view=revision&revision=1188745

    Affected packages

    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