httpd security update

Synopsis

httpd security update

Type/Severity

Security Advisory: Important

Topic

Updated httpd packages that include a security fix for mod_ssl and various
enhancements are now available.

Description

The Apache HTTP server is a powerful, full-featured, efficient, and
freely-available Web server.

An input filter bug in mod_ssl was discovered in Apache httpd version
2.0.50 and earlier. A remote attacker could force an SSL connection to be
aborted in a particular state and cause an Apache child process to enter an
infinite loop, consuming CPU resources. The Common Vulnerabilities and
Exposures project (cve.mitre.org) has assigned the name CAN-2004-0748 to
this issue.

Additionally, this update includes the following enhancements and bug fixes:

• included an improved version of the mod_cgi module that correctly handles
  concurrent output on stderr and stdout
  
• included support for direct lookup of SSL variables using %{SSL:...}
  from mod_rewrite, or using %{...}s from mod_headers
  
• restored support for use of SHA1-encoded passwords
  
• added the mod_ext_filter module
  

Users of the Apache HTTP server should upgrade to these updated packages,
which contain backported patches that address these issues.

Solution

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

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

Affected Products

• Red Hat Enterprise Linux Server 3 x86_64
• Red Hat Enterprise Linux Server 3 ia64
• Red Hat Enterprise Linux Server 3 i386
• Red Hat Enterprise Linux Workstation 3 x86_64
• Red Hat Enterprise Linux Workstation 3 ia64
• Red Hat Enterprise Linux Workstation 3 i386
• Red Hat Enterprise Linux Desktop 3 x86_64
• Red Hat Enterprise Linux Desktop 3 i386
• Red Hat Enterprise Linux for IBM z Systems 3 s390x
• Red Hat Enterprise Linux for IBM z Systems 3 s390
• Red Hat Enterprise Linux for Power, big endian 3 ppc

Fixes

• BZ - 112216 - 4097+ bytes of stderr from cgi script causes script to hang
• BZ - 117959 - Apache autoindex corrupt when > 2GB file in tree
• BZ - 119651 - HTTP authentication against password file with SHA1 password hashes fails
• BZ - 120072 - please enable mod_ext_filter
• BZ - 120096 - mod_ssl environment variables not available in mod_rewrite rules

CVEs

• CVE-2004-0748

References

• http://nagoya.apache.org/bugzilla/show_bug.cgi?id=29964