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Red Hat Enterprise Linux 6 RHSA-2013:1120-01 Moderate DoS in haproxy

red hat
Calendar Grey July 30, 2013
Dist Redhat Esm H88
Timely Red Hat Notification regarding haproxy offering essential upgrades to mitigate a denial of service vulnerability in settings.
An updated haproxy package that fixes one security issue is now available for Red Hat Enterprise Linux 6

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/site/articles/11258

Summary

HAProxy provides high availability, load balancing, and proxying for TCP and HTTP-based applications.
A flaw was found in the way HAProxy handled requests when the proxy's configuration ("/etc/haproxy/haproxy.cfg") had certain rules that use the hdr_ip criterion. A remote attacker could use this flaw to crash HAProxy instances that use the affected configuration. (CVE-2013-2175)
Red Hat would like to thank HAProxy upstream for reporting this issue. Upstream acknowledges David Torgerson as the original reporter.
HAProxy is released as a Technology Preview in Red Hat Enterprise Linux 6. More information about Red Hat Technology Previews is available at https://access.redhat.com/support/offerings/techpreview/
All users of haproxy are advised to upgrade to this updated package, which contains a backported patch to correct this issue.

Topics%20covered

Topics Covered

security advisory moderate security update DoS Red Hat Enterprise haproxy

References

https://access.redhat.com/security/cve/CVE-2013-2175 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/support/offerings/techpreview/

Package List

Red Hat Enterprise Linux Load Balancer (v. 6):
Source:
i386: haproxy-1.4.22-5.el6_4.i686.rpm haproxy-debuginfo-1.4.22-5.el6_4.i686.rpm
x86_64: haproxy-1.4.22-5.el6_4.x86_64.rpm haproxy-debuginfo-1.4.22-5.el6_4.x86_64.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


Advisory ID: RHSA-2013:1120-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2013:1120.html
Issue date: 2013-07-30

Topic

An updated haproxy package that fixes one security issue is now availablefor Red Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory moderate security update DoS Red Hat Enterprise haproxy

Relevant Releases Architectures

Red Hat Enterprise Linux Load Balancer (v. 6) - i386, x86_64

Bugs Fixed

974259 - CVE-2013-2175 haproxy: http_get_hdr()/get_ip_from_hdr2() MAX_HDR_HISTORY handling denial of service

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