Apache Tomcat HTTP BIO Connector Error Discloses Information From Different Requests to Remote Users
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SecurityTracker Alert ID: 1025303 |
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SecurityTracker URL: http://securitytracker.com/id/1025303
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CVE Reference:
CVE-2011-1475
(Links to External Site)
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Date: Apr 7 2011
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Impact:
Disclosure of user information
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 7.0.0 - 7.0.11
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Description:
A vulnerability was reported in Apache Tomcat. A remote user may be able to obtain information from a different request.
When using HTTP pipelining, the system may return information from a different request to a remote user. The vulnerability resides in the HTTP BIO connector.
Brad Piles reported this vulnerability.
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Impact:
A remote user may be able to obtain information from a different request.
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Solution:
The vendor has issued a fix (7.0.12).
The vendor's advisory is available at:
http://tomcat.apache.org/security-7.html#Fixed_in_Apache_Tomcat_7.0.12_%28released_6_Apr_2011%29
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Vendor URL: tomcat.apache.org/security.html (Links to External Site)
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Cause:
Access control error
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Underlying OS:
Linux (Any), UNIX (Any), Windows (Any)
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Message History:
None.
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Source Message Contents
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Date: Wed, 06 Apr 2011 18:28:37 +0100
Subject: [SECURITY] CVE-2011-1475 Apache Tomcat information disclosure
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CVE-2011-1475 Apache Tomcat information disclosure
Severity: Important
Vendor: The Apache Software Foundation
Versions Affected:
- Tomcat 7.0.0 to 7.0.11
- Earlier versions are not affected
Description:
Changes introduced to the HTTP BIO connector to support Servlet 3.0
asynchronous requests did not fully account for HTTP pipelining. As a
result, when using HTTP pipelining a range of unexpected behaviours
occurred including the mixing up of responses between requests. While
the mix-up in responses was only observed between requests from the same
user, a mix-up of responses for requests from different users may also
be possible.
Mitigation:
Users of affected versions should apply one of the following mitigations:
- Upgrade to a Tomcat 7.0.12 or later
- Switch to the NIO or APR/native HTTP connectors that do not exhibit
this issue
Credit:
This issue was identified by Brad Piles and reported via the public ASF
Bugzilla issue tracking system.
The Apache Tomcat security team requests that security vulnerability
reports are made privately to security@tomcat.apache.org in the first
instance.
References:
http://tomcat.apache.org/security.html
http://tomcat.apache.org/security-7.html
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