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Fencer Intel
medium 5.0

CVE-2015-3281 json

The buffer_slow_realign function in HAProxy 1.5.x before 1.5.14 and 1.6-dev does not properly realign a buffer that is used for pending out…

published 2015-07-06 11 y ago modified 2026-06-17 4 mo ago also EUVD-2015-3328

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.3%
EPSS 4.3% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

The buffer_slow_realign function in HAProxy 1.5.x before 1.5.14 and 1.6-dev does not properly realign a buffer that is used for pending outgoing data, which allows remote attackers to obtain sensitive information (uninitialized memory contents of previous requests) via a crafted request.

Patch / fix

  • haproxy Debian 14, Debian 13, Debian 12 1.5.14-1

debian advisories DEBIAN-CVE-2015-3281

  • haproxy RHEL 6 1.5.4-2.el6_7.1
  • haproxy RHEL 7 1.5.4-4.el7_1.1
  • rhc openshift 2.0 1.38.4.5-1.el6op
  • haproxy15side openshift 2.0 1.5.4-2.el6op
  • openshift-origin-node-util openshift 2.0 1.38.5.1-1.el6op
  • openshift-enterprise-release openshift 2.0 2.2.8-1.el6op
  • openshift-enterprise-upgrade openshift 2.0 2.2.8-1.el6op
  • openshift-origin-broker-util openshift 2.0 1.37.4.2-1.el6op

red hat advisories RHSA-2015:1741RHSA-2015:2666

  • haproxy OpenStack Cloud 5 1.5.4-12.1
  • haproxy SLE High Availability Extension 12, Cloud Compute Node for SUSE Linux Enterprise 12 5 1.5.4-2.4.1

suse advisories SUSE-SU-2015:1776-1SUSE-SU-2015:1663-1

  • haproxy openSUSE Tumbleweed 1.7.0-1.1

opensuse advisories openSUSE-SU-2024:10114-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-3281 updated cvss 5.0

haproxy: information leak in buffer_slow_realign()

  • Red Hat Enterprise Linux Load Balancer (v. 6) haproxy 1.5.4-2.el6_7.1 Red Hat Enterprise Linux Server (v. 7) haproxy 1.5.4-4.el7_1.1 Red Hat Enterprise Linux Workstation (v. 7) haproxy 1.5.4-4.el7_1.1
    fixed: vendor fix RHSA-2015:1741
  • Red Hat OpenShift Enterprise Client 2.2 rhc 1.38.4.5-1.el6op Red Hat OpenShift Enterprise Infrastructure 2.2 openshift-enterprise-release 2.2.8-1.el6op, openshift-enterprise-upgrade 2.2.8-1.el6op, openshift-origin-broker-util 1.37.4.2-1.el6op, openshift-enterprise-yum-validator 2.2.8-1.el6op, rubygem-openshift-origin-common 1.29.4.1-1.el6op, openshift-enterprise-upgrade-broker 2.2.8-1.el6op, +2 more Red Hat OpenShift Enterprise JBoss EAP add-on 2.2 openshift-origin-cartridge-jbosseap 2.27.3.1-1.el6op Red Hat OpenShift Enterprise Node 2.2 haproxy15side 1.5.4-2.el6op, openshift-enterprise-release 2.2.8-1.el6op, openshift-enterprise-upgrade 2.2.8-1.el6op, openshift-origin-node-util 1.38.5.1-1.el6op, rubygem-openshift-origin-node 1.38.4.1-1.el6op, openshift-enterprise-upgrade-node 2.2.8-1.el6op, +5 more
    fixed: vendor fix RHSA-2015:2666
  • Red Hat OpenShift Enterprise 2 haproxy
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.33% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.