Apache < 2.4.49 Multiple Vulnerabilities

critical Nessus Plugin ID 153584
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote web server is affected by a vulnerability.

Description

The version of Apache httpd installed on the remote host is prior to 2.4.49. It is, therefore, affected by multiple vulnerabilities as referenced in the 2.4.49 changelog.

- ap_escape_quotes() may write beyond the end of a buffer when given malicious input. No included modules pass untrusted data to these functions, but third-party / external modules may. (CVE-2021-39275)

- Malformed requests may cause the server to dereference a NULL pointer. (CVE-2021-34798)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Apache version 2.4.49 or later.

See Also

https://downloads.apache.org/httpd/CHANGES_2.4

https://httpd.apache.org/security/vulnerabilities_24.html

Plugin Details

Severity: Critical

ID: 153584

File Name: apache_2_4_49.nasl

Version: 1.4

Type: combined

Agent: windows, macosx, unix

Family: Web Servers

Published: 9/23/2021

Updated: 10/1/2021

Dependencies: apache_http_version.nasl, apache_http_server_nix_installed.nbin, apache_httpd_win_installed.nbin

Risk Information

CVSS Score Source: CVE-2021-39275

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:apache:httpd, cpe:/a:apache:http_server

Required KB Items: installed_sw/Apache

Exploit Ease: No known exploits are available

Patch Publication Date: 9/16/2021

Vulnerability Publication Date: 9/16/2021

Reference Information

CVE: CVE-2021-34798, CVE-2021-39275

IAVA: 2021-A-0440