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Red Hat: RHSA-2011:1300-01 Important: httpd Memory Consumption DoS

red hat
Calendar Grey September 15, 2011
Dist Redhat Esm H88
Critical notice for Red Hat Linux clients addressing vulnerabilities in Apache httpd that could result in high resource consumption.
Updated httpd packages that fix one security issue are now available for Red Hat Enterprise Linux 3 Extended Life Cycle Support

Solution

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

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

Summary

The Apache HTTP Server is a popular web server.
A flaw was found in the way the Apache HTTP Server handled Range HTTP headers. A remote attacker could use this flaw to cause httpd to use an excessive amount of memory and CPU time via HTTP requests with a specially-crafted Range header. (CVE-2011-3192)
All httpd users should upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the updated packages, the httpd daemon must be restarted for the update to take effect.

Topics%20covered

Topics Covered

security advisory security update Red Hat DoS httpd important memory consumption

References

https://access.redhat.com/security/cve/CVE-2011-3192 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AS (v. 3 ELS):
Source: httpd-2.0.46-78.ent.src.rpm
i386: httpd-2.0.46-78.ent.i386.rpm httpd-debuginfo-2.0.46-78.ent.i386.rpm httpd-devel-2.0.46-78.ent.i386.rpm mod_ssl-2.0.46-78.ent.i386.rpm
Red Hat Enterprise Linux ES (v. 3 ELS):
Source: httpd-2.0.46-78.ent.src.rpm
i386: httpd-2.0.46-78.ent.i386.rpm httpd-debuginfo-2.0.46-78.ent.i386.rpm httpd-devel-2.0.46-78.ent.i386.rpm mod_ssl-2.0.46-78.ent.i386.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2011:1300-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:1300.html
Issue date: 2011-09-15

Topic

Updated httpd packages that fix one security issue are now available forRed Hat Enterprise Linux 3 Extended Life Cycle Support.The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Topics%20covered

Topics Covered

security advisory security update Red Hat DoS httpd important memory consumption

Relevant Releases Architectures

Red Hat Enterprise Linux AS (v. 3 ELS) - i386

Red Hat Enterprise Linux ES (v. 3 ELS) - i386

Bugs Fixed

732928 - CVE-2011-3192 httpd: multiple ranges DoS

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