RHSA-2010:0011 - Security Advisory

Topic

Updated httpd and httpd22 packages that fix multiple security issues are
now available for JBoss Enterprise Web Server 1.0.0 for Red Hat Enterprise
Linux 4 and 5.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

Description

The Apache HTTP Server is a popular Web server.

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: http://kbase.redhat.com/faq/docs/DOC-20491

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)

All users of JBoss Enterprise Web Server 1.0.0 should upgrade to these
updated packages, which contain backported patches to correct these issues.
After installing the updated packages, Red Hat Enterprise Linux 4 users
must restart the httpd22 service, and Red Hat Enterprise Linux 5 users must
restart the httpd service, for the update to take effect.

Solution

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• JBoss Enterprise Web Server 1 for RHEL 5 x86_64
• JBoss Enterprise Web Server 1 for RHEL 5 i386

Fixes

• BZ - 521619 - CVE-2009-3094 httpd: NULL pointer defer in mod_proxy_ftp caused by crafted EPSV and PASV reply
• BZ - 522209 - CVE-2009-3095 httpd: mod_proxy_ftp FTP command injection via Authorization HTTP header
• BZ - 533125 - CVE-2009-3555 TLS: MITM attacks via session renegotiation

CVEs

• CVE-2009-3094
• CVE-2009-3095
• CVE-2009-3555

References

• http://www.redhat.com/security/updates/classification/#moderate
• http://kbase.redhat.com/faq/docs/DOC-20491