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Arrow  Topic :

Apache Tomcat 6.0.20 and 5.5.28 insecure partial deploy after failed undeploy


Arrow  SecurityAlert : 6979
Arrow  CVE : CVE-2009-2901
Arrow  CWE : CWE-643
Arrow  SecurityRisk : Medium  Security Risk Medium  (About)
Arrow  Remote Exploit : Yes
Arrow  Local Exploit : No
Arrow  Victim interaction required : No
Arrow  Exploit Available : No
Arrow  Credit : Mark Thomas
Arrow  Published : 29.01.2010

Arrow  Affected Software :
Tomcat 5.5.0 to 5.5.28
Tomcat 6.0.0 to 6.0.20
The unsupported Tomcat 3.x, 4.x and 5.0.x versions may be also
affected.



Arrow  Advisory Content :  

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

CVE-2009-2901: Apache Tomcat insecure partial deploy after failed undeploy

Severity: Low

Vendor:
The Apache Software Foundation

Versions Affected:
Tomcat 5.5.0 to 5.5.28
Tomcat 6.0.0 to 6.0.20
The unsupported Tomcat 3.x, 4.x and 5.0.x versions may be also
affected.

Description:
By default, Tomcat automatically deploys any directories placed in a
host's appBase. This behaviour is controlled by the autoDeploy attribute
of a host which defaults to true. After a failed undeploy, the remaining
files will be deployed as a result of the autodeployment process.
Depending on circumstances, files normally protected by one or more
security constraints may be deployed without those security constraints,
making them accessible without authentication.

Mitigation:
6.0.x users should upgrade to 6.0.24 or apply this patch:
http://svn.apache.org/viewvc?rev=892815&view=rev
5.5.x users should upgrade to 5.5.29 when released or apply this patch:
http://svn.apache.org/viewvc?rev=902650&view=rev
Note: the patches also address CVE-2009-2693 and CVE-2009-2902.
Alternatively, users of all Tomcat versions may mitigate this issue by
manually ensuring that an undeploy removes all files. If one or more
files cannot be deleted, it may be necessary to stop Tomcat before the
files can be deleted.

Credit:
This issue was discovered by the Apache Tomcat security team

References:
[1] http://tomcat.apache.org/security.html

Mark Thomas

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Arrow  References :

http://xforce.iss.net/xforce/xfdb/55856
http://www.vupen.com/english/advisories/2010/0213
http://www.securityfocus.com/bid/37942
http://www.securityfocus.com/archive/1/archive/1/509151/100/0/threaded
http://tomcat.apache.org/security-6.html
http://tomcat.apache.org/security-5.html
http://svn.apache.org/viewvc?rev=902650&view=rev
http://svn.apache.org/viewvc?rev=892815&view=rev
http://securitytracker.com/id?1023503
http://secunia.com/advisories/38346
http://secunia.com/advisories/38316




Arrow  Feedback :

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