CVE-2021-41732

Publication date 29 September 2021

Last updated 4 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

An issue was discovered in zeek version 4.1.0. There is a HTTP request splitting vulnerability that will invalidate any ZEEK HTTP based security analysis. NOTE: the vendor’s position is that the observed behavior is intended

Status

Show unmaintained releases

Package	Ubuntu Release	Status
zeek	22.04 LTS jammy	Not in release
	21.10 impish	Ignored end of life
	21.04 hirsute	Ignored end of life
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Ignored end of standard support
	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	High
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

MITRE
NVD
Launchpad
Debian

Other references

https://github.com/zeek/zeek/issues/1798
https://www.cve.org/CVERecord?id=CVE-2021-41732