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Fencer Intel
critical 9.8

CVE-2018-19115 json

keepalived before 2.0.7 has a heap-based buffer overflow when parsing HTTP status codes resulting in DoS or possibly unspecified other impa…

published 8y ago modified 4mo ago also EUVD-2018-10828

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.7%
EPSS 3.7% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

keepalived before 2.0.7 has a heap-based buffer overflow when parsing HTTP status codes resulting in DoS or possibly unspecified other impact, because extract_status_code in lib/html.c has no validation of the status code and instead writes an unlimited amount of data to the heap.

Patch / fix

  • keepalived keepalived 2.0.7
  • keepalived Debian 14, Debian 13, Debian 12 1:2.0.10-1

debian advisories DEBIAN-CVE-2018-19115

  • keepalived Ubuntu 16.04 LTS 1:1.2.24-1ubuntu0.16.04.2
  • keepalived Ubuntu 18.04 LTS 1:1.3.9-1ubuntu0.18.04.2
  • keepalived Ubuntu Pro 14.04 LTS 1:1.2.7-1ubuntu1+esm1

ubuntu advisories UBUNTU-CVE-2018-19115

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • keepalived RHEL 7 1.3.5-8.el7_6
  • keepalived RHEL 7.4 EUS 1.3.5-1.el7_4.1
  • keepalived RHEL 7.5 EUS 1.3.5-7.el7_5.2

red hat advisories RHSA-2019:1945RHSA-2019:1792RHSA-2019:0022

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-19115 updated cvss 8.1

keepalived: Heap-based buffer overflow when parsing HTTP status codes allows for denial of service or possibly arbitrary code execution

  • Red Hat Enterprise Linux 6 keepalived
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) keepalived 1.3.5-8.el7_6 Red Hat Enterprise Linux Server (v. 7) keepalived 1.3.5-8.el7_6
    fixed: vendor fix RHSA-2019:0022
  • Red Hat Enterprise Linux Server EUS (v. 7.4) keepalived 1.3.5-1.el7_4.1
    fixed: vendor fix RHSA-2019:1945
  • Red Hat Enterprise Linux Server EUS (v. 7.5) keepalived 1.3.5-7.el7_5.2
    fixed: vendor fix RHSA-2019:1792
  • Red Hat Enterprise Linux Workstation (v. 7) keepalived 1.3.5-8.el7_6
    fixed: vendor fix RHSA-2019:0022
  • Red Hat Enterprise Linux 8 keepalived
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.75% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.