Upstream information

CVE-2020-5236 at MITRE

Description

Waitress version 1.4.2 allows a DOS attack When waitress receives a header that contains invalid characters. When a header like "Bad-header: xxxxxxxxxxxxxxx\x10" is received, it will cause the regular expression engine to catastrophically backtrack causing the process to use 100% CPU time and blocking any other interactions. This allows an attacker to send a single request with an invalid header and take the service offline. This issue was introduced in version 1.4.2 when the regular expression was updated to attempt to match the behaviour required by errata associated with RFC7230. The regular expression that is used to validate incoming headers has been updated in version 1.4.3, it is recommended that people upgrade to the new version of Waitress as soon as possible.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 6.8
Vector AV:N/AC:L/Au:S/C:N/I:N/A:C
Access Vector Network
Access Complexity Low
Authentication Single
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
CVSS v3 Scores
  National Vulnerability Database
Base Score 6.5
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1162656 [RESOLVED / UPSTREAM]

No SUSE Security Announcements cross referenced.


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Enterprise Storage 7.1 python-waitress Not affected
SUSE Linux Enterprise Desktop 15 SP5 python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5 python-waitress Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP5 python-waitress Not affected
SUSE Linux Enterprise Module for Package Hub 15 SP4 python-waitress Not affected
SUSE Linux Enterprise Module for Package Hub 15 SP5 python-waitress Not affected
SUSE Linux Enterprise Real Time 15 SP3 python-waitress Not affected
SUSE Linux Enterprise Server 15 SP5 python-waitress Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 python-waitress Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP5 python-waitress Not affected
SUSE Manager Proxy 4.3 python-waitress Not affected
SUSE Manager Retail Branch Server 4.3 python-waitress Not affected
SUSE Manager Server 4.3 python-waitress Not affected
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise Desktop 15 SP4 python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15 python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1 python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15 SP2 python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3 python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4 python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15-ESPOS python-waitress Not affected
SUSE Linux Enterprise High Performance Computing 15-LTSS python-waitress Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP2 python-waitress Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP3 python-waitress Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP4 python-waitress Not affected
SUSE Linux Enterprise Server 15 SP2 python-waitress Not affected
SUSE Linux Enterprise Server 15 SP2-LTSS python-waitress Not affected
SUSE Linux Enterprise Server 15 SP3 python-waitress Not affected
SUSE Linux Enterprise Server 15 SP3-LTSS python-waitress Not affected
SUSE Linux Enterprise Server 15 SP4 python-waitress Not affected
SUSE Linux Enterprise Server 15 SP4-LTSS python-waitress Not affected
SUSE Linux Enterprise Server for SAP Applications 15 python-waitress Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP1 python-waitress Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP2 python-waitress Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 python-waitress Not affected
Products past their end of life and not receiving proactive updates anymore.
HPE Helion OpenStack 8 python-waitress Not affected
HPE Helion OpenStack Cloud 8 python-waitress Not affected
SUSE CaaS Platform 4.0 python-waitress Not affected
SUSE Enterprise Storage 5 python-waitress Not affected
SUSE Enterprise Storage 6 python-waitress Not affected
SUSE Enterprise Storage 7 python-waitress Not affected
SUSE Linux Enterprise Desktop 15 python-waitress Not affected
SUSE Linux Enterprise Desktop 15 SP1 python-waitress Not affected
SUSE Linux Enterprise Desktop 15 SP2 python-waitress Not affected
SUSE Linux Enterprise Desktop 15 SP3 python-waitress Not affected
SUSE Linux Enterprise Module for Basesystem 15 python-waitress Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP1 python-waitress Not affected
SUSE Linux Enterprise Module for Package Hub 15 python-waitress Not affected
SUSE Linux Enterprise Module for Package Hub 15 SP1 python-waitress Not affected
SUSE Linux Enterprise Module for Package Hub 15 SP2 python-waitress Not affected
SUSE Linux Enterprise Module for Package Hub 15 SP3 python-waitress Not affected
SUSE Linux Enterprise Real Time 15 SP2 python-waitress Not affected
SUSE Linux Enterprise Real Time 15 SP4 python-waitress Not affected
SUSE Linux Enterprise Server 15 python-waitress Not affected
SUSE Linux Enterprise Server 15 SP1 python-waitress Not affected
SUSE Linux Enterprise Server 15 SP1-BCL python-waitress Not affected
SUSE Linux Enterprise Server 15 SP1-LTSS python-waitress Not affected
SUSE Linux Enterprise Server 15 SP2-BCL python-waitress Not affected
SUSE Linux Enterprise Server 15 SP3-BCL python-waitress Not affected
SUSE Linux Enterprise Server 15-LTSS python-waitress Not affected
SUSE Manager Proxy 4.0 python-waitress Not affected
SUSE Manager Proxy 4.1 python-waitress Not affected
SUSE Manager Proxy 4.2 python-waitress Not affected
SUSE Manager Retail Branch Server 4.0 python-waitress Not affected
SUSE Manager Retail Branch Server 4.1 python-waitress Not affected
SUSE Manager Retail Branch Server 4.2 python-waitress Not affected
SUSE Manager Server 4.0 python-waitress Not affected
SUSE Manager Server 4.1 python-waitress Not affected
SUSE Manager Server 4.2 python-waitress Not affected
SUSE OpenStack Cloud 6 python-waitress Not affected
SUSE OpenStack Cloud 6-LTSS python-waitress Not affected
SUSE OpenStack Cloud 7 python-waitress Not affected
SUSE OpenStack Cloud 8 python-waitress Not affected
SUSE OpenStack Cloud 9 python-waitress Not affected
SUSE OpenStack Cloud Crowbar 8 python-waitress Not affected
SUSE OpenStack Cloud Crowbar 9 python-waitress Not affected


SUSE Timeline for this CVE

CVE page created: Tue Feb 4 13:24:37 2020
CVE page last modified: Thu Feb 22 17:12:11 2024