rsyslog up to 8.26.x imptcp Message input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability was found in rsyslog up to 8.26.x. It has been classified as problematic. Affected is an unknown function of the component imptcp. This manipulation as part of Message causes input validation. This vulnerability is handled as CVE-2018-16881. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in rsyslog up to 8.26.x and classified as problematic. Affected by this vulnerability is an unknown code block of the component imptcp. The manipulation as part of a Message leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. The summary by CVE is:

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.

The bug was discovered 01/25/2019. The weakness was released 01/25/2019 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2018-16881 since 09/11/2018. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 121539 (SUSE SLED12 / SLES12 Security Update : rsyslog (SUSE-SU-2019:0209-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 172065 (OpenSUSE Security Update for rsyslog (openSUSE-SU-2019:0154-1)).

Upgrading to version 8.27.0 eliminates this vulnerability. A possible mitigation has been published 6 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (121539). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 121539
Nessus Name: SUSE SLED12 / SLES12 Security Update : rsyslog (SUSE-SU-2019:0209-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: rsyslog 8.27.0

Timelineinfo

09/11/2018 🔍
01/25/2019 +136 days 🔍
01/25/2019 +0 days 🔍
01/25/2019 +0 days 🔍
01/26/2019 +1 days 🔍
01/31/2019 +5 days 🔍
02/01/2019 +1 days 🔍
07/03/2023 +1613 days 🔍

Sourcesinfo

Advisory: RHSA-2019:2110
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-16881 (🔍)
GCVE (CVE): GCVE-0-2018-16881
GCVE (VulDB): GCVE-100-130261

Entryinfo

Created: 01/26/2019 18:48
Updated: 07/03/2023 14:32
Changes: 01/26/2019 18:48 (69), 05/06/2020 10:41 (3), 07/03/2023 14:32 (4)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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