CVE-2021-33193

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

16/08/2021

Last modified:

01/05/2025

Description

A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): High
Availability (A): None

Base Score 3.x

7.50

Severity 3.x

HIGH

Vector 2.0

AV:N/AC:L/Au:N/C:N/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): Physical
Availability (A): None

Base Score 2.0

5.00

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:debian:debian_linux:10.0:::::::*
cpe:2.3:a:apache:http_server::::::::	2.4.17 (including)	2.4.49 (excluding)
cpe:2.3:o:fedoraproject:fedora:34:::::::*
cpe:2.3:o:fedoraproject:fedora:35:::::::*
cpe:2.3:a:tenable:tenable.sc::::::::		5.19.1 (including)
cpe:2.3:a:oracle:secure_backup::::::::		18.1.0.1.0 (excluding)
cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-33193

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools