haproxy: Out-of-bounds read in dns.c:dns_validate_dns_response() allows for memory disclosure
Published Dec 12, 2018
7.5
HIGHCVSS 3.0
EPSS 4.15%
Description
An out-of-bounds read in dns_validate_dns_response in dns.c was discovered in HAProxy through 1.8.14. Due to a missing check when validating DNS responses, remote attackers might be able read the 16 bytes corresponding to an AAAA record from the non-initialized part of the buffer, possibly accessing anything that was left on the stack, or even past the end of the 8193-byte buffer, depending on the value of accepted_payload_size.
Affected products
No data.
Configuration 2
- 16.04
- 18.04
- 18.10
Configuration 3
- 3.11
No data.
Red Hat OpenShift Container Platform 3.11
atomic-enterprise-service-catalog-1:3.11.82-1.git.1673.133961e.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
atomic-openshift-0:3.11.82-1.git.0.08bc31b.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
atomic-openshift-cluster-autoscaler-0:3.11.82-1.git.0.efb6af0.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
atomic-openshift-descheduler-0:3.11.82-1.git.300.89765c9.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
atomic-openshift-dockerregistry-0:3.11.82-1.git.452.0ce6383.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
atomic-openshift-metrics-server-0:3.11.82-1.git.52.2fdca3f.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
atomic-openshift-node-problem-detector-0:3.11.82-1.git.254.a448936.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
atomic-openshift-service-idler-0:3.11.82-1.git.14.e353758.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
atomic-openshift-web-console-0:3.11.82-1.git.355.5e8b1d9.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
golang-github-openshift-oauth-proxy-0:3.11.82-1.git.425.7cac034.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
golang-github-prometheus-alertmanager-0:3.11.82-1.git.0.3bf41ce.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
golang-github-prometheus-node_exporter-0:3.11.82-1.git.1063.48444e8.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
golang-github-prometheus-prometheus-0:3.11.82-1.git.5027.9d24833.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
haproxy-0:1.8.17-3.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
jenkins-0:2.150.2.1549032159-1.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
jenkins-2-plugins-0:3.11.1549642489-1.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
openshift-ansible-0:3.11.82-3.git.0.9718d0a.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
openshift-enterprise-autoheal-0:3.11.82-1.git.219.0b5aff4.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.11
openshift-enterprise-cluster-capacity-0:3.11.82-1.git.380.cf11c51.el7
Fixed · RHBA-2019:0326
Red Hat OpenShift Container Platform 3.9
haproxy-0:1.8.17-3.el7
Fixed · RHSA-2019:0547
Red Hat Software Collections for Red Hat Enterprise Linux 7
rh-haproxy18-haproxy-0:1.8.17-1.el7
Fixed · RHSA-2019:1436
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS
rh-haproxy18-haproxy-0:1.8.17-1.el7
Fixed · RHSA-2019:1436
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
rh-haproxy18-haproxy-0:1.8.17-1.el7
Fixed · RHSA-2019:1436
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS
rh-haproxy18-haproxy-0:1.8.17-1.el7
Fixed · RHSA-2019:1436
Red Hat Enterprise Linux 6
haproxy
Not affected
Red Hat Enterprise Linux 7
haproxy
Not affected
Red Hat Enterprise Linux 8
haproxy
Not affected
Red Hat OpenShift Container Platform 3.10
haproxy
Affected
Red Hat OpenShift Container Platform 3.7
haproxy
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat OpenShift Container Platform 3.11 | atomic-enterprise-service-catalog-1:3.11.82-1.git.1673.133961e.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-0:3.11.82-1.git.0.08bc31b.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-cluster-autoscaler-0:3.11.82-1.git.0.efb6af0.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-descheduler-0:3.11.82-1.git.300.89765c9.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-dockerregistry-0:3.11.82-1.git.452.0ce6383.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-metrics-server-0:3.11.82-1.git.52.2fdca3f.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-node-problem-detector-0:3.11.82-1.git.254.a448936.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-service-idler-0:3.11.82-1.git.14.e353758.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-web-console-0:3.11.82-1.git.355.5e8b1d9.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | golang-github-openshift-oauth-proxy-0:3.11.82-1.git.425.7cac034.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | golang-github-prometheus-alertmanager-0:3.11.82-1.git.0.3bf41ce.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | golang-github-prometheus-node_exporter-0:3.11.82-1.git.1063.48444e8.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | golang-github-prometheus-prometheus-0:3.11.82-1.git.5027.9d24833.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | haproxy-0:1.8.17-3.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | jenkins-0:2.150.2.1549032159-1.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | jenkins-2-plugins-0:3.11.1549642489-1.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | openshift-ansible-0:3.11.82-3.git.0.9718d0a.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | openshift-enterprise-autoheal-0:3.11.82-1.git.219.0b5aff4.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.11 | openshift-enterprise-cluster-capacity-0:3.11.82-1.git.380.cf11c51.el7 | Fixed | RHBA-2019:0326 |
| Red Hat OpenShift Container Platform 3.9 | haproxy-0:1.8.17-3.el7 | Fixed | RHSA-2019:0547 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | rh-haproxy18-haproxy-0:1.8.17-1.el7 | Fixed | RHSA-2019:1436 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS | rh-haproxy18-haproxy-0:1.8.17-1.el7 | Fixed | RHSA-2019:1436 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS | rh-haproxy18-haproxy-0:1.8.17-1.el7 | Fixed | RHSA-2019:1436 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS | rh-haproxy18-haproxy-0:1.8.17-1.el7 | Fixed | RHSA-2019:1436 |
| Red Hat Enterprise Linux 6 | haproxy | Not affected | n/a |
| Red Hat Enterprise Linux 7 | haproxy | Not affected | n/a |
| Red Hat Enterprise Linux 8 | haproxy | Not affected | n/a |
| Red Hat OpenShift Container Platform 3.10 | haproxy | Affected | n/a |
| Red Hat OpenShift Container Platform 3.7 | haproxy | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of haproxy as shipped with Red Hat Enterprise Linux 6 and 7.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
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
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (19 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.15% (0.04150) | 90.54th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.35% (0.04347) | 89.93th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.02% (0.00016) | 1.75th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.42% (0.00417) | 74.93th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.42% (0.00417) | 74.15th | v3 (v2023.03.01) |
| May 4, 2024 | 0.51% (0.00509) | 76.43th | v3 (v2023.03.01) |
| May 3, 2024 | 0.73% (0.00733) | 80.67th | v3 (v2023.03.01) |
| Dec 6, 2023 | 0.73% (0.00733) | 78.60th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.86% (0.00864) | 80.39th | v3 (v2023.03.01) |
| May 10, 2023 | 0.69% (0.00686) | 77.12th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.95% (0.00946) | 80.76th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.82% (0.01823) | 35.21th | v1 |
| Jan 6, 2022 | 1.82% (0.01823) | 34.51th | v1 |
| Sep 1, 2021 | 1.82% (0.01823) | 74.64th | v1 |
| Apr 14, 2021 | 1.82% (0.01823) | 0.00th | v1 |
References (12)
- http://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=efbbdf72992cd20458259962346044cafd9331c0 x_refsource_MISC
- http://www.securityfocus.com/bid/106223 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHBA-2019:0326 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHBA-2019:0327 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1436 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2018-20102 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1658874 Issue Tracking
- https://lists.debian.org/debian-lts-announce/2022/05/msg00045.html mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2018-20102
- https://usn.ubuntu.com/3858-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-20102
- https://www.mail-archive.com/haproxy@formilux.org/msg32055.html
| Link | Providers | Tags |
|---|---|---|
| http://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=efbbdf72992cd20458259962346044cafd9331c0 | x_refsource_MISC | |
| http://www.securityfocus.com/bid/106223 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/errata/RHBA-2019:0326 | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/errata/RHBA-2019:0327 | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/errata/RHSA-2019:1436 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/security/cve/CVE-2018-20102 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1658874 | Issue Tracking | |
| https://lists.debian.org/debian-lts-announce/2022/05/msg00045.html | mailing-listx_refsource_MLIST | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-20102 | ||
| https://usn.ubuntu.com/3858-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-20102 | ||
| https://www.mail-archive.com/haproxy@formilux.org/msg32055.html |
Change history (0)
No recorded changes yet.