Apache 2.4.x < 2.4.34 Multiple Vulnerabilities

high Nessus Plugin ID 111788

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Synopsis

The remote web server is affected by multiple vulnerabilities.

Description

According to its banner, the version of Apache running on the remote host is 2.4.x prior to 2.4.34. It is, therefore, affected by the following vulnerabilities:

 - By specially crafting HTTP/2 requests, workers would be allocated 60 seconds longer than necessary, leading to worker exhaustion and a denial of service. (CVE-2018-1333)

 - By specially crafting HTTP requests, the mod_md challenge handler would dereference a NULL pointer and cause the child process to segfault. This could be used to DoS the server. (CVE-2018-8011)

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

Solution

Upgrade to Apache version 2.4.34 or later.

See Also

https://archive.apache.org/dist/httpd/CHANGES_2.4.34

https://httpd.apache.org/security/vulnerabilities_24.html#2.4.34

Plugin Details

Severity: High

ID: 111788

File Name: apache_2_4_34.nasl

Version: 1.9

Type: combined

Agent: windows, macosx, unix

Family: Web Servers

Published: 8/16/2018

Updated: 9/24/2021

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

Risk Information

CVSS Score Source: CVE-2018-1333

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

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

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

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

Required KB Items: installed_sw/Apache

Exploit Ease: No known exploits are available

Patch Publication Date: 7/15/2018

Vulnerability Publication Date: 7/15/2018

Reference Information

CVE: CVE-2018-1333, CVE-2018-8011

IAVA: 2021-A-0259-S