CVE-2018-20103
haproxy: Infinite recursion via crafted packet allows stack exhaustion and denial of service
Severity
ImportantRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · December 12, 2018
Updated · June 28, 2026
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.
Statement
This issue did not affect the versions of haproxy as shipped with Red Hat Enterprise Linux 6 and 7.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-400 · Uncontrolled Resource Consumption