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AUSCERT External Security Bulletin Redistribution
Important: haproxy security update
9 September 2015
AusCERT Security Bulletin Summary
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Red Hat Enterprise Linux WS/Desktop 7
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
CVE Names: CVE-2015-3281
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Red Hat Security Advisory
Synopsis: Important: haproxy security update
Advisory ID: RHSA-2015:1741-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1741.html
Issue date: 2015-09-08
CVE Names: CVE-2015-3281
An updated haproxy package that fixes one security issue is now available
for Red Hat Enterprise Linux 6 and 7.
Red Hat Product Security has rated this update as having Important security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
2. Relevant releases/architectures:
Red Hat Enterprise Linux Load Balancer (v. 6) - i386, x86_64
Red Hat Enterprise Linux Server (v. 7) - x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
HAProxy provides high availability, load balancing, and proxying for TCP
and HTTP-based applications.
An implementation error related to the memory management of request and
responses was found within HAProxy's buffer_slow_realign() function.
An unauthenticated remote attacker could possibly use this flaw to leak
certain memory buffer contents from a past request or session.
All haproxy users are advised to upgrade to this updated package, which
contains a backported patch to correct this issue.
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
For details on how to apply this update, refer to:
5. Bugs fixed (https://bugzilla.redhat.com/):
1239072 - CVE-2015-3281 haproxy: information leak in buffer_slow_realign()
6. Package List:
Red Hat Enterprise Linux Load Balancer (v. 6):
Red Hat Enterprise Linux Server (v. 7):
Red Hat Enterprise Linux Workstation (v. 7):
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <firstname.lastname@example.org>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2015 Red Hat, Inc.
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