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CVE-2015-3281

16
FAUCET Score

CVE-2015-3281 is a buffer realignment vulnerability in HAProxy versions 1.5.x before 1.5.14 and 1.6-dev, affecting various distributions including Canonical, Debian, OpenSUSE, Red Hat, and SUSE. This flaw allows remote attackers to obtain sensitive information, specifically uninitialized memory contents from previous requests, due to improper handling of outgoing data buffers. With a CVSS score of 5.0 (medium severity), it has a low attack complexity and requires no authentication, but only impacts confidentiality. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
1.5CPE matchmatch criteria
cpe:2.3:a:haproxy:haproxy:1.5:dev:*:*:*:*:*:*
1.5CPE matchmatch criteria
cpe:2.3:a:haproxy:haproxy:1.5:dev0:*:*:*:*:*:*
1.5CPE matchmatch criteria
cpe:2.3:a:haproxy:haproxy:1.5:dev1:*:*:*:*:*:*
1.5CPE matchmatch criteria
cpe:2.3:a:haproxy:haproxy:1.5:dev10:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:P/I:N/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.27%
Probability of exploitation in next 30 days
EPSS Percentile
90.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0427 is in the 87th percentile among its peer group of 23,701 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (15)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: haproxy-0:1.5.4-2.el6_7.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: haproxy-0:1.5.4-4.el7_1.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Enterprise 2.2Fixed in: haproxy15side-0:1.5.4-2.el6op
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Enterprise 2.2Fixed in: openshift-enterprise-upgrade-0:2.2.8-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Enterprise 2.2Fixed in: openshift-origin-broker-util-0:1.37.4.2-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Enterprise 2.2Fixed in: openshift-origin-cartridge-haproxy-0:1.31.4.1-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Enterprise 2.2Fixed in: openshift-origin-cartridge-jbosseap-0:2.27.3.1-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Enterprise 2.2Fixed in: openshift-origin-cartridge-jbossews-0:1.35.3.2-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Enterprise 2.2Fixed in: openshift-origin-cartridge-python-0:1.34.1.1-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Enterprise 2.2Fixed in: openshift-origin-node-util-0:1.38.5.1-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Enterprise 2.2Fixed in: rhc-0:1.38.4.5-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Enterprise 2.2Fixed in: rubygem-openshift-origin-common-0:1.29.4.1-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Enterprise 2.2Fixed in: rubygem-openshift-origin-controller-0:1.38.4.2-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Enterprise 2.2Fixed in: rubygem-openshift-origin-node-0:1.38.4.1-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Enterprise 2.2Fixed in: rubygem-openshift-origin-routing-daemon-0:0.26.4.4-1.el6op
View patch

Vendor Advisories (1)

redhatCVE-2015-3281Important

haproxy: information leak in buffer_slow_realign()

Jul 7, 2015

References

git.haproxy.org
lists.opensuse.org / opensuse-security-announce/2015-10/msg00001.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-10/msg00023.html
Mailing ListThird Party Advisory
rhn.redhat.com / errata/RHSA-2015-1741.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2015-2666.html
Third Party Advisory
debian.org / security/2015/dsa-3301
Third Party Advisory
haproxy.org / news.html
PatchVendor Advisory
securityfocus.com / bid/75554
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2668-1
Third Party Advisory