CVE-2018-20103

medium
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
5.5

Description

An issue was discovered in dns.c in HAProxy through 1.8.14. In the case of a compressed pointer, a crafted packet can trigger infinite recursion by making the pointer point to itself, or create a long chain of valid pointers resulting in stack exhaustion.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2018-20103

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2018-20103.html

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-201901-15

OS impact

OSVersionStatusFixed in
arch archfixed1.9.0-1
suse slesaffected
debian debianbookwormfixed1.8.15-1
debian debianbullseyefixed1.8.15-1
debian debianforkyfixed1.8.15-1
debian debiansidfixed1.8.15-1
debian debiantrixiefixed1.8.15-1

References

Verify integrity in audit chain (admin only). AS-IS.