According to its banner, the version of Apache 2.2.x running on the remote host is prior to 2.2.15. It is, therefore, potentially affected by multiple vulnerabilities :

  - A TLS renegotiation prefix injection attack is possible.     (CVE-2009-3555)

  - The 'mod_proxy_ajp' module returns the wrong status code     if it encounters an error which causes the back-end     server to be put into an error state. (CVE-2010-0408)

  - The 'mod_isapi' attempts to unload the 'ISAPI.dll' when     it encounters various error states which could leave     call-backs in an undefined state. (CVE-2010-0425)

  - A flaw in the core sub-request process code can lead to     sensitive information from a request being handled by     the wrong thread if a multi-threaded environment is     used. (CVE-2010-0434)

  - Added 'mod_reqtimeout' module to mitigate Slowloris     attacks. (CVE-2007-6750)

Updated httpd packages that fix two security issues and add an enhancement are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The Apache HTTP Server is a popular web server.

It was discovered that mod_proxy_ajp incorrectly returned an 'Internal Server Error' response when processing certain malformed requests, which caused the back-end server to be marked as failed in configurations where mod_proxy is used in load balancer mode. A remote attacker could cause mod_proxy to not send requests to back-end AJP (Apache JServ Protocol) servers for the retry timeout period (60 seconds by default) by sending specially crafted requests.
(CVE-2010-0408)

A use-after-free flaw was discovered in the way the Apache HTTP Server handled request headers in subrequests. In configurations where subrequests are used, a multithreaded MPM (Multi-Processing Module) could possibly leak information from other requests in request replies. (CVE-2010-0434)

This update also adds the following enhancement :

* with the updated openssl packages from RHSA-2010:0162 installed, mod_ssl will refuse to renegotiate a TLS/SSL connection with an unpatched client that does not support RFC 5746. This update adds the 'SSLInsecureRenegotiation' configuration directive. If this directive is enabled, mod_ssl will renegotiate insecurely with unpatched clients. (BZ#567980)

Refer to the following Red Hat Knowledgebase article for more details about the changed mod_ssl behavior:
http://kbase.redhat.com/faq/docs/DOC-20491

All httpd users should upgrade to these updated packages, which contain backported patches to correct these issues and add this enhancement. After installing the updated packages, the httpd daemon must be restarted for the update to take effect.

The following bugs have been fixed :

When using a multi-threaded MPM apache could leak memory of requests handled by a different thread when processing subrequests (CVE-2010-0434). Specially crafted requests could crash mod_proxy_ajp.
(CVE-2010-0408)

The Apache HTTP Server Project is proud to announce the release of version 2.2.15 of the Apache HTTP Server ('httpd'). This version is principally a security and bugfix release. Notably, this release was updated to reflect the OpenSSL Project's release 0.9.8m of the openssl library, and addresses CVE-2009-3555 (cve.mitre.org), the TLS renegotiation prefix injection attack. This release further addresses the issues CVE-2010-0408 and CVE-2010-0434 within mod_proxy_ajp and mod_headers respectively. See the upstream changes file for further information: http://www.apache.org/dist/httpd/CHANGES_2.2.15

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

New httpd packages are available for Slackware 12.0, 12.1, 12.2, 13.0, and -current to fix security issues. mod_ssl: A partial fix for the TLS renegotiation prefix injection attack by rejecting any client-initiated renegotiations. mod_proxy_ajp: Respond with HTTP_BAD_REQUEST when the body is not sent when request headers indicate a request body is incoming; not a case of HTTP_INTERNAL_SERVER_ERROR. mod_isapi: Do not unload an isapi .dll module until the request processing is completed, avoiding orphaned callback pointers. [This is the most serious flaw, but does not affect Linux systems]

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
45004	Apache 2.2.x < 2.2.15 Multiple Vulnerabilities	Nessus	Web Servers	2010/10/20	2018/11/15	critical
45367	CentOS 5 : httpd (CESA-2010:0168)	Nessus	CentOS Local Security Checks	2010/3/29	2021/1/4	medium
49827	SuSE 10 Security Update : Apache 2 (ZYPP Patch Number 6987)	Nessus	SuSE Local Security Checks	2010/10/11	2021/1/14	medium
47408	Fedora 13 : httpd-2.2.15-1.fc13 (2010-5942)	Nessus	Fedora Local Security Checks	2010/7/1	2021/1/11	medium
45007	Slackware 12.0 / 12.1 / 12.2 / 13.0 / current : httpd (SSA:2010-067-01)	Nessus	Slackware Local Security Checks	2010/3/9	2021/1/14	critical

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