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TI-2018-12091 Aliases CVE-2018-16881GHSA-hg54-w573-5vvv

Integer overflow in rsyslog:

Priority LOW 37CWE-190Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.

Summary

A denial of service vulnerability was found in rsyslog in the imptcp module. An attacker could send a specially crafted message to the imptcp socket, which would cause rsyslog to crash. Versions before 8.27.0 are vulnerable.

Why it matters now

EPSS 0.02238 82nd percentileScored 2026-11-07
Fix Fixed Red Hat: 3 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
The rsyslog Projectrsyslog:8.27.0—No fix listedCNA
  • rsyslog: VendorThe rsyslog Project Affected 8.27.0 Fixed in — No fix listed CNA

CPE configurations NVD · 13

CPEVersionsRoleVendor
cpe:2.3:a:rsyslog:rsyslog:*:*:*:*:*:*:*:*before 8.27.0Vulnerablersyslog
cpe:2.3:a:redhat:virtualization_manager:4.3:*:*:*:*:*:*:*4.3VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_for_scientific_computing:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:*4.0VulnerableRed Hat
  • cpe:2.3:a:rsyslog:rsyslog:*:*:*:*:*:*:*:* Versions before 8.27.0 Vulnerable ·rsyslog
  • cpe:2.3:a:redhat:virtualization_manager:4.3:*:*:*:*:*:*:* Versions 4.3 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_for_scientific_computing:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
Show 3 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:*4.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0Running onRed Hat
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
  • cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Running on ·Red Hat
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian

Remediation

Red Hat 3 advisories

  • RHSA-2019:2437 Released 2019-08-12 · Red Hat rating Important
    Red Hat Virtualization security update
    • RHEL 7-based RHEV-H for RHEV 4 (build requirements) imgbased-1.1.9-0.1.el7ev, ovirt-node-ng-4.3.5-0.20190717.0.el7ev, ovirt-node-ng-nodectl-4.3.5-0.20190717.0.el7ev +4
    • Red Hat Virtualization 4 Hypervisor for RHEL 7 redhat-virtualization-host-4.3.5-20190722.0.el7_7, redhat-virtualization-host-image-update-4.3.5-20190722.0.el7_7
  • RHSA-2019:2439 Released 2019-08-12 · Red Hat rating Moderate
    rhvm-appliance security, bug fix, and enhancement update
    • Red Hat Virtualization 4 Hypervisor for RHEL 7 rhvm-appliance-2:4.3-20190722.0.el7
    • Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts rhvm-appliance-2:4.3-20190722.0.el7
  • RHSA-2019:2110 Released 2019-08-06 · Red Hat rating Moderate
    rsyslog security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) rsyslog-8.24.0-38.el7, rsyslog-gnutls-8.24.0-38.el7, rsyslog-gssapi-8.24.0-38.el7 +3
    • Red Hat Enterprise Linux Client Optional (v. 7) rsyslog-crypto-8.24.0-38.el7, rsyslog-doc-8.24.0-38.el7, rsyslog-elasticsearch-8.24.0-38.el7 +9
    • Red Hat Enterprise Linux ComputeNode (v. 7) rsyslog-8.24.0-38.el7, rsyslog-gnutls-8.24.0-38.el7, rsyslog-gssapi-8.24.0-38.el7 +3
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) rsyslog-crypto-8.24.0-38.el7, rsyslog-doc-8.24.0-38.el7, rsyslog-elasticsearch-8.24.0-38.el7 +9
    • Red Hat Enterprise Linux Server (v. 7) rsyslog-8.24.0-38.el7, rsyslog-gnutls-8.24.0-38.el7, rsyslog-gssapi-8.24.0-38.el7 +5
    • Red Hat Enterprise Linux Server Optional (v. 7) rsyslog-crypto-8.24.0-38.el7, rsyslog-doc-8.24.0-38.el7, rsyslog-elasticsearch-8.24.0-38.el7 +8
    • Red Hat Enterprise Linux Workstation (v. 7) rsyslog-8.24.0-38.el7, rsyslog-gnutls-8.24.0-38.el7, rsyslog-gssapi-8.24.0-38.el7 +5
    • Red Hat Enterprise Linux Workstation Optional (v. 7) rsyslog-crypto-8.24.0-38.el7, rsyslog-doc-8.24.0-38.el7, rsyslog-elasticsearch-8.24.0-38.el7 +7

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
RHEL 7-based RHEV-H for RHEV 4 (build requirements)Fixed RHSA-2019:2437
RHV-M 4.3Fixed—
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2019:2110
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2019:2110
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2019:2110
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2019:2110
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2019:2110
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2019:2110
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:2110
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2019:2110
Red Hat Virtualization 4 Hypervisor for RHEL 7Fixed RHSA-2019:2437, RHSA-2019:2439
Red Hat Virtualization 4 Management Agent for RHEL 7 HostsFixed RHSA-2019:2439
Not affected: 3 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-16881
  2. 2026-10-03 Alias added: GHSA-hg54-w573-5vvv

References

Patch 1

Advisory 5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences