Date:         Thu, 12 Nov 2009 14:58:35 -0600
Reply-To:     Troy Dawson 
Sender:       Security Errata for Scientific Linux
              
From:         Troy Dawson 
Subject:      Security ERRATA Moderate: httpd on SL3.x, SL4.x, SL5.x i386/x86_64
Comments: To: "scientific-linux-errata@fnal.gov"
          

Synopsis:	Moderate: httpd security update
Issue date:	2009-11-11
CVE Names:	CVE-2009-1891 CVE-2009-3094 CVE-2009-3095
                   CVE-2009-3555

CVE-2009-1891 httpd: possible temporary DoS (CPU consumption) in mod_deflate
CVE-2009-3094 httpd: NULL pointer defer in mod_proxy_ftp caused by 
crafted EPSV and PASV reply
CVE-2009-3095 httpd: mod_proxy_ftp FTP command injection via 
Authorization HTTP header
CVE-2009-3555 TLS: MITM attacks via session renegotiation

A flaw was found in the way the TLS/SSL (Transport Layer Security/Secure
Sockets Layer) protocols handle session renegotiation. A 
man-in-the-middle attacker could use this flaw to prefix arbitrary plain 
text to a client's session (for example, an HTTPS connection to a 
website). This could force the server to process an attacker's request 
as if authenticated using the victim's credentials. This update 
partially mitigates this flaw for SSL sessions to HTTP servers using 
mod_ssl by rejecting client-requested renegotiation. (CVE-2009-3555)

Note: This update does not fully resolve the issue for HTTPS servers. An
attack is still possible in configurations that require a 
server-initiated renegotiation. Refer to the following Knowledgebase 
article for further information: 
A denial of service flaw was found in the Apache mod_deflate module. 
This module continued to compress large files until compression was 
complete, even if the network connection that requested the content was 
closed before compression completed. This would cause mod_deflate to 
consume large amounts of CPU if mod_deflate was enabled for a large 
file. (CVE-2009-1891) - SL4 only

A NULL pointer dereference flaw was found in the Apache mod_proxy_ftp
module. A malicious FTP server to which requests are being proxied could
use this flaw to crash an httpd child process via a malformed reply to 
the EPSV or PASV commands, resulting in a limited denial of service.
(CVE-2009-3094)

A second flaw was found in the Apache mod_proxy_ftp module. In a reverse
proxy configuration, a remote attacker could use this flaw to bypass
intended access restrictions by creating a carefully-crafted HTTP
Authorization header, allowing the attacker to send arbitrary commands 
to the FTP server. (CVE-2009-3095)

After installing the updated packages, the httpd daemon must be 
restarted for the update to take effect.

SL 3.0.x

       SRPMS:
httpd-2.0.46-77.sl3.src.rpm
       i386:
httpd-2.0.46-77.sl3.i386.rpm
httpd-devel-2.0.46-77.sl3.i386.rpm
mod_ssl-2.0.46-77.sl3.i386.rpm
       x86_64:
httpd-2.0.46-77.sl3.x86_64.rpm
httpd-devel-2.0.46-77.sl3.x86_64.rpm
mod_ssl-2.0.46-77.sl3.x86_64.rpm

SL 4.x

       SRPMS:
httpd-2.0.52-41.sl4.6.src.rpm
       i386:
httpd-2.0.52-41.sl4.6.i386.rpm
httpd-devel-2.0.52-41.sl4.6.i386.rpm
httpd-manual-2.0.52-41.sl4.6.i386.rpm
httpd-suexec-2.0.52-41.sl4.6.i386.rpm
mod_ssl-2.0.52-41.sl4.6.i386.rpm
       x86_64:
httpd-2.0.52-41.sl4.6.x86_64.rpm
httpd-devel-2.0.52-41.sl4.6.x86_64.rpm
httpd-manual-2.0.52-41.sl4.6.x86_64.rpm
httpd-suexec-2.0.52-41.sl4.6.x86_64.rpm
mod_ssl-2.0.52-41.sl4.6.x86_64.rpm

SL 5.x

       SRPMS:
httpd-2.2.3-31.sl5.2.src.rpm
       i386:
httpd-2.2.3-31.sl5.2.i386.rpm
httpd-devel-2.2.3-31.sl5.2.i386.rpm
httpd-manual-2.2.3-31.sl5.2.i386.rpm
mod_ssl-2.2.3-31.sl5.2.i386.rpm
       x86_64:
httpd-2.2.3-31.sl5.2.x86_64.rpm
httpd-devel-2.2.3-31.sl5.2.i386.rpm
httpd-devel-2.2.3-31.sl5.2.x86_64.rpm
httpd-manual-2.2.3-31.sl5.2.x86_64.rpm
mod_ssl-2.2.3-31.sl5.2.x86_64.rpm

-Connie Sieh
-Troy Dawson