CVE-2018-16881
mediumpriority · track · 31EPSS 0.022 · 83 %ileEURUUSEPSS · scored 2026-10-27
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.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- Fixedrsyslog-0:8.24.0-41.el7_7.ppc64le as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/2974891
https://access.redhat.com/errata/RHBA-2019:2501 - Fixedrsyslog-0:8.24.0-41.el7_7.src as a component of RHV-M 4.3redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/2974891
https://access.redhat.com/errata/RHBA-2019:2501 - Fixedrsyslog-0:8.24.0-41.el7_7.src as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/2974891
https://access.redhat.com/errata/RHBA-2019:2501 - Fixedrsyslog-debuginfo-0:8.24.0-41.el7_7.x86_64 as a component of RHV-M 4.3redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/2974891
https://access.redhat.com/errata/RHBA-2019:2501 - Fixedrsyslog-debuginfo-0:8.24.0-41.el7_7.x86_64 as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/2974891
https://access.redhat.com/errata/RHBA-2019:2501 - Fixedrsyslog-elasticsearch-0:8.24.0-41.el7_7.ppc64le as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/2974891
https://access.redhat.com/errata/RHBA-2019:2501 - Fixedrsyslog-elasticsearch-0:8.24.0-41.el7_7.x86_64 as a component of RHV-M 4.3redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/2974891
https://access.redhat.com/errata/RHBA-2019:2501 - Fixedrsyslog-elasticsearch-0:8.24.0-41.el7_7.x86_64 as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/2974891
https://access.redhat.com/errata/RHBA-2019:2501 - Fixedrsyslog-mmjsonparse-0:8.24.0-41.el7_7.ppc64le as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/2974891
https://access.redhat.com/errata/RHBA-2019:2501 - Fixedrsyslog-mmnormalize-0:8.24.0-41.el7_7.ppc64le as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/2974891
https://access.redhat.com/errata/RHBA-2019:2501 - Fixedrsyslog-mmnormalize-0:8.24.0-41.el7_7.x86_64 as a component of RHV-M 4.3redhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/2974891
https://access.redhat.com/errata/RHBA-2019:2501 - Fixedrsyslog-mmnormalize-0:8.24.0-41.el7_7.x86_64 as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/2974891
https://access.redhat.com/errata/RHBA-2019:2501 - Workaroundrsyslog-0:8.24.0-41.el7_7.ppc64le as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
This vulnerability requires the "imptcp" module to be enabled, and listening on a port that can potentially be reached by attackers. This module is not enabled by default in Red Hat Enterprise Linux 7. To check if imptcp is enabled, look for the string `$InputPTCPServerRun`in your rsyslog configuration.
- Workaroundrsyslog-0:8.24.0-41.el7_7.src as a component of RHV-M 4.3redhat_csaf
This vulnerability requires the "imptcp" module to be enabled, and listening on a port that can potentially be reached by attackers. This module is not enabled by default in Red Hat Enterprise Linux 7. To check if imptcp is enabled, look for the string `$InputPTCPServerRun`in your rsyslog configuration.
- Workaroundrsyslog-0:8.24.0-41.el7_7.src as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
This vulnerability requires the "imptcp" module to be enabled, and listening on a port that can potentially be reached by attackers. This module is not enabled by default in Red Hat Enterprise Linux 7. To check if imptcp is enabled, look for the string `$InputPTCPServerRun`in your rsyslog configuration.
- Workaroundrsyslog-debuginfo-0:8.24.0-41.el7_7.x86_64 as a component of RHV-M 4.3redhat_csaf
This vulnerability requires the "imptcp" module to be enabled, and listening on a port that can potentially be reached by attackers. This module is not enabled by default in Red Hat Enterprise Linux 7. To check if imptcp is enabled, look for the string `$InputPTCPServerRun`in your rsyslog configuration.
- Workaroundrsyslog-debuginfo-0:8.24.0-41.el7_7.x86_64 as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
This vulnerability requires the "imptcp" module to be enabled, and listening on a port that can potentially be reached by attackers. This module is not enabled by default in Red Hat Enterprise Linux 7. To check if imptcp is enabled, look for the string `$InputPTCPServerRun`in your rsyslog configuration.
- Workaroundrsyslog-elasticsearch-0:8.24.0-41.el7_7.ppc64le as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
This vulnerability requires the "imptcp" module to be enabled, and listening on a port that can potentially be reached by attackers. This module is not enabled by default in Red Hat Enterprise Linux 7. To check if imptcp is enabled, look for the string `$InputPTCPServerRun`in your rsyslog configuration.
- Workaroundrsyslog-elasticsearch-0:8.24.0-41.el7_7.x86_64 as a component of RHV-M 4.3redhat_csaf
This vulnerability requires the "imptcp" module to be enabled, and listening on a port that can potentially be reached by attackers. This module is not enabled by default in Red Hat Enterprise Linux 7. To check if imptcp is enabled, look for the string `$InputPTCPServerRun`in your rsyslog configuration.
- Workaroundrsyslog-elasticsearch-0:8.24.0-41.el7_7.x86_64 as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
This vulnerability requires the "imptcp" module to be enabled, and listening on a port that can potentially be reached by attackers. This module is not enabled by default in Red Hat Enterprise Linux 7. To check if imptcp is enabled, look for the string `$InputPTCPServerRun`in your rsyslog configuration.
- Workaroundrsyslog-mmjsonparse-0:8.24.0-41.el7_7.ppc64le as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
This vulnerability requires the "imptcp" module to be enabled, and listening on a port that can potentially be reached by attackers. This module is not enabled by default in Red Hat Enterprise Linux 7. To check if imptcp is enabled, look for the string `$InputPTCPServerRun`in your rsyslog configuration.
- Workaroundrsyslog-mmnormalize-0:8.24.0-41.el7_7.ppc64le as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
This vulnerability requires the "imptcp" module to be enabled, and listening on a port that can potentially be reached by attackers. This module is not enabled by default in Red Hat Enterprise Linux 7. To check if imptcp is enabled, look for the string `$InputPTCPServerRun`in your rsyslog configuration.
- Workaroundrsyslog-mmnormalize-0:8.24.0-41.el7_7.x86_64 as a component of RHV-M 4.3redhat_csaf
This vulnerability requires the "imptcp" module to be enabled, and listening on a port that can potentially be reached by attackers. This module is not enabled by default in Red Hat Enterprise Linux 7. To check if imptcp is enabled, look for the string `$InputPTCPServerRun`in your rsyslog configuration.
- Workaroundrsyslog-mmnormalize-0:8.24.0-41.el7_7.x86_64 as a component of Red Hat Virtualization 4 Management Agent for RHEL 7 Hostsredhat_csaf
This vulnerability requires the "imptcp" module to be enabled, and listening on a port that can potentially be reached by attackers. This module is not enabled by default in Red Hat Enterprise Linux 7. To check if imptcp is enabled, look for the string `$InputPTCPServerRun`in your rsyslog configuration.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (32)
Products and version ranges known to be affected.
- redhat enterprise linux for ibm z systems= 7.0nvdUScpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:*:*:*:*:*:*:*:*
- redhat enterprise linux for power big endian= 7.0nvdUScpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:*:*:*:*:*:*:*:*
- redhat enterprise linux for power little endian= 7.0nvdUScpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:*:*:*:*:*:*:*:*
- redhat enterprise linux for scientific computing= 7.0nvdUScpe:2.3:o:redhat:enterprise_linux_for_scientific_computing:*:*:*:*:*:*:*:*
- redhat enterprise linux workstation= 7.0nvdUScpe:2.3:o:redhat:enterprise_linux_workstation:*:*:*:*:*:*:*:*
advisories (1)
Vendor and ecosystem advisories describing this.
- RHBA-2019:2501Red Hat Bug Fix Advisory: rsyslog bug fix update2019-08-15csaf · redhat_csafUS
Updated rsyslog packages that fix one bug are now available for Red Hat Virtualization 4.3
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (28)
External citations — patches, advisories, analysis.
- https://access.redhat.com/errata/RHBA-2019:2501cnnvd
- https://access.redhat.com/errata/RHSA-2019:2110cnnvd
- https://access.redhat.com/errata/RHSA-2019:2437cnnvd
- https://access.redhat.com/errata/RHSA-2019:2439cnnvd
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16881cnnvd
- https://github.com/rsyslog/rsyslog/commit/0381a0de64a5a048c3d48b79055bd9848d0c7fc2Patchcnnvd
- https://lists.debian.org/debian-lts-announce/2022/05/msg00028.htmlcnnvd
- https://packetstormsecurity.com/files/153945/Red-Hat-Security-Advisory-2019-2110-01.htmlcnnvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan