Public Date:
1651871: CVE-2018-19115 keepalived: Heap-based buffer overflow when parsing HTTP status codes allows for denial of service or possibly arbitrary code execution
Heap-based buffer overflow vulnerability in extract_status_code() function in lib/html.c that parses HTTP status code returned from web server allows malicious web server or man-in-the-middle attacker pretending to be a web server to cause either a denial of service or potentially execute arbitrary code on keepalived load balancer.

Find out more about CVE-2018-19115 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue affects the versions of keepalived as shipped with Red Hat Enterprise Linux 6 and 7.

Red Hat Enterprise Linux 6 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This has been rated as having a security impact of Important, and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle:

CVSS v3 metrics

CVSS3 Base Score 8.1
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 7 (keepalived) RHSA-2019:0022 2019-01-03

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 8 keepalived Not affected
Red Hat Enterprise Linux 6 keepalived Will not fix
Last Modified