haproxy: information leak in buffer_slow_realign()
Published Jul 6, 2015
5.0
MEDIUMCVSS 2.0
EPSS 4.36%
Description
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.
Affected products
No data.
Configuration 1
- 8.0
Configuration 2
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5
- 1.5.0
- 1.5.1
- 1.5.2
- 1.5.3
- 1.5.4
- 1.5.5
- 1.5.6
- 1.5.7
- 1.5.8
- 1.5.9
- 1.5.10
- 1.5.11
- 1.5.12
- 1.5.13
- 1.6
Configuration 3
- 14.10
- 15.04
Configuration 4
- 5
- 13.2
- 12
Configuration 5
- 7.0
- 7.0
- 7.3
- 7.4
- 7.6
- 7.1
- 7.2
- 7.3
- 7.4
- 7.5
- 7.6
- 7.3
- 7.6
- 7.0
No data.
Red Hat Enterprise Linux 6
haproxy-0:1.5.4-2.el6_7.1
Fixed · RHSA-2015:1741
Red Hat Enterprise Linux 7
haproxy-0:1.5.4-4.el7_1.1
Fixed · RHSA-2015:1741
Red Hat OpenShift Enterprise 2.2
haproxy15side-0:1.5.4-2.el6op
Fixed · RHSA-2015:2666
Red Hat OpenShift Enterprise 2.2
openshift-enterprise-upgrade-0:2.2.8-1.el6op
Fixed · RHSA-2015:2666
Red Hat OpenShift Enterprise 2.2
openshift-origin-broker-util-0:1.37.4.2-1.el6op
Fixed · RHSA-2015:2666
Red Hat OpenShift Enterprise 2.2
openshift-origin-cartridge-haproxy-0:1.31.4.1-1.el6op
Fixed · RHSA-2015:2666
Red Hat OpenShift Enterprise 2.2
openshift-origin-cartridge-jbosseap-0:2.27.3.1-1.el6op
Fixed · RHSA-2015:2666
Red Hat OpenShift Enterprise 2.2
openshift-origin-cartridge-jbossews-0:1.35.3.2-1.el6op
Fixed · RHSA-2015:2666
Red Hat OpenShift Enterprise 2.2
openshift-origin-cartridge-python-0:1.34.1.1-1.el6op
Fixed · RHSA-2015:2666
Red Hat OpenShift Enterprise 2.2
openshift-origin-node-util-0:1.38.5.1-1.el6op
Fixed · RHSA-2015:2666
Red Hat OpenShift Enterprise 2.2
rhc-0:1.38.4.5-1.el6op
Fixed · RHSA-2015:2666
Red Hat OpenShift Enterprise 2.2
rubygem-openshift-origin-common-0:1.29.4.1-1.el6op
Fixed · RHSA-2015:2666
Red Hat OpenShift Enterprise 2.2
rubygem-openshift-origin-controller-0:1.38.4.2-1.el6op
Fixed · RHSA-2015:2666
Red Hat OpenShift Enterprise 2.2
rubygem-openshift-origin-node-0:1.38.4.1-1.el6op
Fixed · RHSA-2015:2666
Red Hat OpenShift Enterprise 2.2
rubygem-openshift-origin-routing-daemon-0:0.26.4.4-1.el6op
Fixed · RHSA-2015:2666
Red Hat OpenShift Enterprise 2
haproxy
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | haproxy-0:1.5.4-2.el6_7.1 | Fixed | RHSA-2015:1741 |
| Red Hat Enterprise Linux 7 | haproxy-0:1.5.4-4.el7_1.1 | Fixed | RHSA-2015:1741 |
| Red Hat OpenShift Enterprise 2.2 | haproxy15side-0:1.5.4-2.el6op | Fixed | RHSA-2015:2666 |
| Red Hat OpenShift Enterprise 2.2 | openshift-enterprise-upgrade-0:2.2.8-1.el6op | Fixed | RHSA-2015:2666 |
| Red Hat OpenShift Enterprise 2.2 | openshift-origin-broker-util-0:1.37.4.2-1.el6op | Fixed | RHSA-2015:2666 |
| Red Hat OpenShift Enterprise 2.2 | openshift-origin-cartridge-haproxy-0:1.31.4.1-1.el6op | Fixed | RHSA-2015:2666 |
| Red Hat OpenShift Enterprise 2.2 | openshift-origin-cartridge-jbosseap-0:2.27.3.1-1.el6op | Fixed | RHSA-2015:2666 |
| Red Hat OpenShift Enterprise 2.2 | openshift-origin-cartridge-jbossews-0:1.35.3.2-1.el6op | Fixed | RHSA-2015:2666 |
| Red Hat OpenShift Enterprise 2.2 | openshift-origin-cartridge-python-0:1.34.1.1-1.el6op | Fixed | RHSA-2015:2666 |
| Red Hat OpenShift Enterprise 2.2 | openshift-origin-node-util-0:1.38.5.1-1.el6op | Fixed | RHSA-2015:2666 |
| Red Hat OpenShift Enterprise 2.2 | rhc-0:1.38.4.5-1.el6op | Fixed | RHSA-2015:2666 |
| Red Hat OpenShift Enterprise 2.2 | rubygem-openshift-origin-common-0:1.29.4.1-1.el6op | Fixed | RHSA-2015:2666 |
| Red Hat OpenShift Enterprise 2.2 | rubygem-openshift-origin-controller-0:1.38.4.2-1.el6op | Fixed | RHSA-2015:2666 |
| Red Hat OpenShift Enterprise 2.2 | rubygem-openshift-origin-node-0:1.38.4.1-1.el6op | Fixed | RHSA-2015:2666 |
| Red Hat OpenShift Enterprise 2.2 | rubygem-openshift-origin-routing-daemon-0:0.26.4.4-1.el6op | Fixed | RHSA-2015:2666 |
| Red Hat OpenShift Enterprise 2 | haproxy | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.36% (0.04357) | 90.93th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.24% (0.04239) | 89.71th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.09% (0.00094) | 24.21th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.34% (0.00337) | 72.16th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.34% (0.00337) | 70.51th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.34% (0.00337) | 66.71th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.97% (0.01974) | 78.97th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.97% (0.01974) | 78.46th | v2 (v2022.01.01) |
| Feb 3, 2023 | 3.78% (0.03779) | 85.12th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.97% (0.01974) | 77.12th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.97% (0.01974) | 56.20th | v2 (v2022.01.01) |
References (13)
- http://git.haproxy.org/?p=haproxy-1.5.git%3Ba=commit%3Bh=7ec765568883b2d4e5a2796adbeb492a22ec9bd4 x_refsource_CONFIRM
- http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00001.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00023.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2015-1741.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2015-2666.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.debian.org/security/2015/dsa-3301 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.haproxy.org/news.html x_refsource_CONFIRMPatchVendor Advisory
- http://www.securityfocus.com/bid/75554 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-2668-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2015-3281 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1239072 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-3281
- https://www.cve.org/CVERecord?id=CVE-2015-3281
Change history (0)
No recorded changes yet.