CVE-2019-19886

Publication date 21 January 2020

Last updated 17 July 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Trustwave ModSecurity 3.0.0 through 3.0.3 allows an attacker to send crafted requests that may, when sent quickly in large volumes, lead to the server becoming slow or unresponsive (Denial of Service) because of a flaw in Transaction::addRequestHeader in transaction.cc.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
modsecurity	20.04 LTS focal	Not affected
	19.10 eoan	Ignored end of life
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

How can I get the fixes?
What do statuses mean?

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

MITRE
NVD
Launchpad
Debian

Other references

https://github.com/SpiderLabs/ModSecurity/pull/2202
https://github.com/SpiderLabs/ModSecurity/commit/7ba77631f9a37e0680d23ee57c455c6a35c65cb9
https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/modsecurity-denial-of-service-details-cve-2019-19886/
https://www.cve.org/CVERecord?id=CVE-2019-19886