CVE catalog
CVE-2020-11100
haproxy: CVE-2020-11100
- Severity
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 61.59% · Oct 25, 2026
In hpack_dht_insert in hpack-tbl.c in the HPACK decoder in HAProxy 1.8 through 2.x before 2.1.4, a remote attacker can write arbitrary bytes around a certain location on the heap via a crafted HTTP/2 request, possibly causing remote code execution.
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 |
| Alpine | haproxy | 3.10 | 2.0.14-r0 | fixed |
| Alpine | haproxy | 3.11 | 2.0.14-r0 | fixed |
| Alpine | haproxy | 3.12 | 2.1.4-r0 | fixed |
| Alpine | haproxy | 3.13 | 2.1.4-r0 | fixed |
| Alpine | haproxy | 3.14 | 2.1.4-r0 | fixed |
| Alpine | haproxy | 3.15 | 2.1.4-r0 | fixed |
| Alpine | haproxy | 3.16 | 2.1.4-r0 | fixed |
| Alpine | haproxy | 3.17 | 2.1.4-r0 | fixed |
| Alpine | haproxy | 3.18 | 2.1.4-r0 | fixed |
| Alpine | haproxy | 3.19 | 2.1.4-r0 | fixed |
| Alpine | haproxy | 3.20 | 2.1.4-r0 | fixed |
| Alpine | haproxy | 3.21 | 2.1.4-r0 | fixed |
| Alpine | haproxy | 3.22 | 2.1.4-r0 | fixed |
| Alpine | haproxy | 3.23 | 2.1.4-r0 | fixed |
| Alpine | haproxy | 3.24 | 2.1.4-r0 | fixed |
| Alpine | haproxy | 3.9 | 1.8.25-r0 | 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 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.4 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.6 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.7 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.8 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.9 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.10 | fixed |
| Suse | haproxy | linux enterprise high availability extension 15 | 2.0.10+git0.ac198b92-3.19.1 | 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 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.4 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.6 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.7 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.8 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.9 | vulnerable |
| Ubuntu | haproxy | 18.04 | 1.8.8-1ubuntu0.10 | fixed |
| Suse | haproxy | linux enterprise high availability extension 15 sp1 | 2.0.10+git0.ac198b92-8.12.1 | fixed |
| Opensuse | haproxy | leap 15.1 | 2.0.10+git0.ac198b92-lp151.2.9.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | haproxy | source | sid | 2.0.13-2 | not yet assigned | Not reported | Not reported |
| Debian | haproxy | source | forky | 2.0.13-2 | not yet assigned | Not reported | Not reported |
| Debian | haproxy | source | trixie | 2.0.13-2 | not yet assigned | Not reported | Not reported |
| Debian | haproxy | source | bookworm | 2.0.13-2 | not yet assigned | Not reported | Not reported |
| Alpine | haproxy | apk | 3.10 | 2.0.14-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.11 | 2.0.14-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.12 | 2.1.4-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.13 | 2.1.4-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.14 | 2.1.4-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.15 | 2.1.4-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.16 | 2.1.4-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.17 | 2.1.4-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.18 | 2.1.4-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.19 | 2.1.4-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.20 | 2.1.4-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.21 | 2.1.4-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.22 | 2.1.4-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.23 | 2.1.4-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.24 | 2.1.4-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Alpine | haproxy | apk | 3.9 | 1.8.25-r0 | Not reported | ALPINE-CVE-2020-11100 | Not reported |
| Ubuntu | haproxy | deb | 18.04 | 1.8.8-1ubuntu0.10 | Not reported | USN-4321-1 | Not reported |
| Suse | haproxy | rpm | linux enterprise high availability extension 15 | 2.0.10+git0.ac198b92-3.19.1 | Not reported | SUSE-SU-2020:0852-1 | Not reported |
| Ubuntu | haproxy | deb | 18.04 | 1.8.8-1ubuntu0.10 | Not reported | UBUNTU-CVE-2020-11100 | Not reported |
| Suse | haproxy | rpm | linux enterprise high availability extension 15 sp1 | 2.0.10+git0.ac198b92-8.12.1 | Not reported | SUSE-SU-2020:0851-1 | Not reported |
| Opensuse | haproxy | rpm | leap 15.1 | 2.0.10+git0.ac198b92-lp151.2.9.1 | Not reported | OPENSUSE-SU-2020:0444-1 | 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:
2.0.13-2dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· arm64 · bookwormFixed · Fixed:
2.0.13-2dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· amd64 · bookworm-securityFixed · Fixed:
2.0.13-2dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· arm64 · bookworm-securityFixed · Fixed:
2.0.13-2dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- [haproxy-doc]Unknown
Source package: [haproxy]
Details (4)
2.6.12-1+deb12u3· all · bookwormFixed · Fixed:
2.0.13-2dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookwormFixed · Fixed:
2.0.13-2dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookworm-securityFixed · Fixed:
2.0.13-2dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookworm-securityFixed · Fixed:
2.0.13-2dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
- [vim-haproxy]Unknown
Source package: [haproxy]
Details (4)
2.6.12-1+deb12u3· all · bookwormFixed · Fixed:
2.0.13-2dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookwormFixed · Fixed:
2.0.13-2dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookworm-securityFixed · Fixed:
2.0.13-2dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
2.6.12-1+deb12u3· all · bookworm-securityFixed · Fixed:
2.0.13-2dsa · haproxy · debian · bookworm; dsa · haproxy · debian · 12
[Debian 13 (Trixie)]
- [haproxy]Unknown
Details (5)
3.0.11-1+deb13u3· amd64 · trixieFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
3.0.11-1+deb13u3· arm64 · trixieFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
3.0.11-1+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
3.0.11-1+deb13u3· arm64 · trixie-securityFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
3.0.11-1+deb13u4· amd64 · trixie-securityFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
- [haproxy-doc]Unknown
Source package: [haproxy]
Details (5)
3.0.11-1+deb13u3· all · trixieFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixieFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixie-securityFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixie-security · Historical versionFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
3.0.11-1+deb13u4· all · trixie-securityFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
- [vim-haproxy]Unknown
Source package: [haproxy]
Details (5)
3.0.11-1+deb13u3· all · trixieFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixieFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixie-security · Historical versionFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
3.0.11-1+deb13u3· all · trixie-securityFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
3.0.11-1+deb13u4· all · trixie-securityFixed · Fixed:
2.0.13-2dsa · haproxy · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2020_1288.json]
- [https://osv.dev/vulnerability/ALPINE-CVE-2020-11100]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2020-11100]
- [https://osv.dev/vulnerability/DSA-4649-1]
- [https://osv.dev/vulnerability/SUSE-SU-2020:0851-1]
- [https://osv.dev/vulnerability/SUSE-SU-2020:0852-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2020-11100]
- [https://osv.dev/vulnerability/USN-4321-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2020:0444-1]
- [https://security-tracker.debian.org/tracker/CVE-2020-11100]
- [https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-11100.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2024/wid-sec-w-2024-0054.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]