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Apache 2 mod_ssl Denial of Service Vulnerabilities
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Secunia Advisory:
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SA12434
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Release Date:
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2004-09-02
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Last Update:
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2004-09-15
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Popularity:
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13,954 views
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Critical:
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Less critical
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Impact:
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DoS
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Apache 2.0.x
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| CVE reference: | CVE-2004-0748
CVE-2004-0751
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Description:
Two vulnerabilities have been reported in Apache 2 mod_ssl, which can be exploited by malicious people to cause a DoS (Denial of Service).
1) It is possible to cause mod_ssl to enter an infinite loop by aborting a SSL connection in a particular state. This causes the process to consume large amounts of CPU resources.
2) An error in mod_ssl when running in "speculative" mode can be exploited to cause an access violation via e.g. a proxy request to a remote SSL server.
The vulnerabilities have been reported in Apache 2.0.50 and prior.
Solution:
Update to version 2.0.51.
http://httpd.apache.org/download.cgi
Provided and/or discovered by:
1) Keil Hartmut
2) M. "Alex" Hankins
Changelog:
2004-09-07: Added information about second vulnerability and updated "Solution" section.
2004-09-14: Added information about version 2.0.51-dev.
2004-09-15: Added information about version 2.0.51.
Original Advisory:
http://issues.apache.org/bugzilla/show_bug.cgi?id=27945
http://issues.apache.org/bugzilla/show_bug.cgi?id=29690
http://issues.apache.org/bugzilla/show_bug.cgi?id=30134
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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