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TITLE:
Apache Tomcat sendfile Security Bypass and Denial of Service

SECUNIA ADVISORY ID:
SA45232

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/45232/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=45232

RELEASE DATE:
2011-07-15

DISCUSS ADVISORY:
http://secunia.com/advisories/45232/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/45232/

ONLY AVAILABLE IN CUSTOMER AREA:
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https://ca.secunia.com/?page=viewadvisory&vuln_id=45232

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
A security issue and a vulnerability have been reported in Apache
Tomcat, which can be exploited by malicious, local users to bypass
certain security restrictions or cause a DoS (Denial of Service).

1) The security issue is caused due to Apache Tomcat not properly
verifying sendfile request attributes when running under a security
manager, which can be exploited by a malicious web application to
bypass intended restrictions and e.g. disclose local files.

2) The vulnerability is caused due to Apache Tomcat not properly
handling sendfile request with invalid start and endpoints, which can
be exploited to crash the JVM.

Successful exploitation requires that a malicious web application is
deployed and a security manager and the HTTP NIO or HTTP APR
connector with enabled sendfile is used.

SOLUTION:
Update to versions 5.5.34, 6.0.33, or 7.0.19 when available. Also
fixed in the SVN repository and the vendor has also provided a
proposed patch for Apache Tomcat versions 5 and 6.

Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

PROVIDED AND/OR DISCOVERED BY:
Tomcat Security Team

ORIGINAL ADVISORY:
http://tomcat.apache.org/security-5.html#To_be_fixed_in_Apache_Tomcat_5.5.34_(not_yet_released)
http://tomcat.apache.org/security-6.html#To_be_fixed_in_Apache_Tomcat_6.0.33_(not_yet_released)
http://tomcat.apache.org/security-7.html#Fixed_in_Apache_Tomcat_7.0.19_(not_yet_released)

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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About:
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