CVE catalog
CVE-2018-20102
haproxy: CVE-2018-20102
- Severity
- Medium · CVSS 6.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 4.15% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | haproxy | sid | 3.2.26-1 | fixed |
| Debian | haproxy | forky | 3.2.26-1 | fixed |
| Debian | haproxy | trixie | 3.0.11-1+deb13u3 | fixed |
| Debian | haproxy | trixie-security | 3.0.11-1+deb13u4 | fixed |
| Debian | haproxy | bookworm | 2.6.12-1+deb12u3 | fixed |
| Debian | haproxy | bookworm-security | 2.6.12-1+deb12u4 | fixed |
| Ubuntu | haproxy | 16.04 | 1.5.14-1 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.5.15-1 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.6.2-1 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.6.2-2 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.6.2-2ubuntu1 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.6.2-2ubuntu3 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.6.3-1 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.6.3-1ubuntu0.1 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.6.3-1ubuntu0.2 | fixed |
| Ubuntu | haproxy | 18.04 | 1.7.9-1ubuntu1 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.7.9-1ubuntu2 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.4-1 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.7-1 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.1 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.2 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.3 | fixed |
| Suse | haproxy | linux enterprise high availability extension 15 | 1.8.15~git0.6b6a350a-3.6.2 | fixed |
| Ubuntu | haproxy | 16.04 | 1.5.14-1 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.5.15-1 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.6.2-1 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.6.2-2 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.6.2-2ubuntu1 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.6.2-2ubuntu3 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.6.3-1 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.6.3-1ubuntu0.1 | vulnerable |
| Ubuntu | haproxy | 16.04 | 1.6.3-1ubuntu0.2 | fixed |
| Ubuntu | haproxy | 18.04 | 1.7.9-1ubuntu1 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.7.9-1ubuntu2 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.4-1 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.7-1 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.1 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.2 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.3 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | haproxy | source | sid | 1.8.15-1 | not yet assigned | Not reported | [916308] |
| Debian | haproxy | source | forky | 1.8.15-1 | not yet assigned | Not reported | [916308] |
| Debian | haproxy | source | trixie | 1.8.15-1 | not yet assigned | Not reported | [916308] |
| Debian | haproxy | source | bookworm | 1.8.15-1 | not yet assigned | Not reported | [916308] |
| Ubuntu | haproxy | deb | 16.04 | 1.6.3-1ubuntu0.2 | Not reported | USN-3858-1 | Not reported |
| Ubuntu | haproxy | deb | 18.04 | 1.8.8-1ubuntu0.3 | Not reported | USN-3858-1 | Not reported |
| Suse | haproxy | rpm | linux enterprise high availability extension 15 | 1.8.15~git0.6b6a350a-3.6.2 | Not reported | SUSE-SU-2019:0061-1 | Not reported |
| Ubuntu | haproxy | deb | 16.04 | 1.6.3-1ubuntu0.2 | Not reported | UBUNTU-CVE-2018-20102 | Not reported |
| Ubuntu | haproxy | deb | 18.04 | 1.8.8-1ubuntu0.3 | Not reported | UBUNTU-CVE-2018-20102 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [haproxy]Unknown
Details (4)
2.6.12-1+deb12u3· amd64 · bookwormFixed · Fixed:
1.8.15-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· arm64 · bookwormFixed · Fixed:
1.8.15-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· amd64 · bookworm-securityFixed · Fixed:
1.8.15-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· arm64 · bookworm-securityFixed · Fixed:
1.8.15-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- [haproxy-doc]Unknown
Source package: [haproxy]
Details (4)
2.6.12-1+deb12u3· all · bookwormFixed · Fixed:
1.8.15-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookwormFixed · Fixed:
1.8.15-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookworm-securityFixed · Fixed:
1.8.15-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookworm-securityFixed · Fixed:
1.8.15-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- [vim-haproxy]Unknown
Source package: [haproxy]
Details (4)
2.6.12-1+deb12u3· all · bookwormFixed · Fixed:
1.8.15-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookwormFixed · Fixed:
1.8.15-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookworm-securityFixed · Fixed:
1.8.15-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookworm-securityFixed · Fixed:
1.8.15-1dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
[Debian 13 (Trixie)]
- [haproxy]Unknown
Details (5)
3.0.11-1+deb13u3· amd64 · trixieFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· arm64 · trixieFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
3.0.11-1+deb13u4· amd64 · trixie-securityFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
- [haproxy-doc]Unknown
Source package: [haproxy]
Details (5)
3.0.11-1+deb13u3· all · trixieFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixieFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixie-securityFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixie-security · Historical versionFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
3.0.11-1+deb13u4· all · trixie-securityFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
- [vim-haproxy]Unknown
Source package: [haproxy]
Details (5)
3.0.11-1+deb13u3· all · trixieFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixieFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixie-security · Historical versionFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixie-securityFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
3.0.11-1+deb13u4· all · trixie-securityFixed · Fixed:
1.8.15-1dsa · haproxy · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2019_0061-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2018-20102]
- [https://osv.dev/vulnerability/DLA-3034-1]
- [https://osv.dev/vulnerability/SUSE-SU-2019:0061-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2018-20102]
- [https://osv.dev/vulnerability/USN-3858-1]
- [https://security-tracker.debian.org/tracker/CVE-2018-20102]
- [https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-20102.json]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]