CVE-2018-16881: Integer Overflow
First published: Wed Apr 19 2017(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/rsyslog | <0:8.24.0-38.el7 | 0:8.24.0-38.el7 |
| redhat/rsyslog | <0:8.24.0-41.el7_7 | 0:8.24.0-41.el7_7 |
| redhat/imgbased | <0:1.1.9-0.1.el7e | 0:1.1.9-0.1.el7e |
| redhat/ovirt-node-ng | <0:4.3.5-0.20190717.0.el7e | 0:4.3.5-0.20190717.0.el7e |
| redhat/redhat-release-virtualization-host | <0:4.3.5-2.el7e | 0:4.3.5-2.el7e |
| redhat/redhat-virtualization-host | <0:4.3.5-20190722.0.el7_7 | 0:4.3.5-20190722.0.el7_7 |
| redhat/rhvm-appliance | <0:4.3-20190722.0.el7 | 0:4.3-20190722.0.el7 |
| Rsyslog Rsyslog | <8.27.0 | |
| Redhat Virtualization Manager | =4.3 | |
| Redhat Enterprise Linux Desktop | =7.0 | |
| Redhat Enterprise Linux For Ibm Z Systems | =7.0 | |
| Redhat Enterprise Linux For Power Big Endian | =7.0 | |
| Redhat Enterprise Linux For Power Little Endian | =7.0 | |
| Redhat Enterprise Linux For Scientific Computing | =7.0 | |
| Redhat Enterprise Linux Server | =7.0 | |
| Redhat Enterprise Linux Workstation | =7.0 | |
| Redhat Virtualization | =4.0 | |
| Redhat Virtualization Host | =4.0 | |
| Redhat Enterprise Linux | =7.0 | |
| Debian Debian Linux | =9.0 |
Remedy
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.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2018-16881 https://nvd.nist.gov/vuln/detail/CVE-2018-16881
- https://bugzilla.redhat.com/show_bug.cgi?id=1658366
- https://access.redhat.com/errata/RHSA-2019:2110
- https://access.redhat.com/errata/RHBA-2019:2501
- https://access.redhat.com/errata/RHSA-2019:2437
- https://access.redhat.com/errata/RHSA-2019:2439
- https://access.redhat.com/security/cve/cve-2018-16881
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16881
- https://lists.debian.org/debian-lts-announce/2022/05/msg00028.html
- https://github.com/rsyslog/rsyslog/commit/0381a0de64a5a048c3d48b79055bd9848d0c7fc2
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1658366#c12
- https://www.myexamcollection.com/312-50v12-vce-questions.htm
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1658366#c17
- https://slopeplay.io
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- agent/softwarecombine
- agent/severity
- agent/weakness
- agent/author
- agent/remedy
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/event
- agent/references
- agent/tags
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2018-16881
- agent/software-canonical-lookup
- agent/last-modified-date
- agent/trending
- package-manager/redhat
- vendor/rsyslog
- canonical/rsyslog rsyslog
- vendor/redhat
- canonical/redhat virtualization manager
- version/redhat virtualization manager/4.3
- canonical/redhat enterprise linux desktop
- version/redhat enterprise linux desktop/7.0
- canonical/redhat enterprise linux for ibm z systems
- version/redhat enterprise linux for ibm z systems/7.0
- canonical/redhat enterprise linux for power big endian
- version/redhat enterprise linux for power big endian/7.0
- canonical/redhat enterprise linux for power little endian
- version/redhat enterprise linux for power little endian/7.0
- canonical/redhat enterprise linux for scientific computing
- version/redhat enterprise linux for scientific computing/7.0
- canonical/redhat enterprise linux server
- version/redhat enterprise linux server/7.0
- canonical/redhat enterprise linux workstation
- version/redhat enterprise linux workstation/7.0
- canonical/redhat virtualization
- version/redhat virtualization/4.0
- canonical/redhat virtualization host
- version/redhat virtualization host/4.0
- canonical/redhat enterprise linux
- version/redhat enterprise linux/7.0
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0