Detections
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AlmaLinux 8 : httpd:2.4 (ALSA-2021:3816)

critical Nessus Plugin ID 158840

Synopsis

The remote AlmaLinux host is missing one or more security updates.

Description

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2021:3816 advisory.

 - In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflow (CVE-2021-26691)

 - A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier. (CVE-2021-40438)

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

Solution

Update the affected mod_http2 and / or mod_md packages.

See Also

https://errata.almalinux.org/8/ALSA-2021-3816.html

Plugin Details

Severity: Critical

ID: 158840

File Name: alma_linux_ALSA-2021-3816.nasl

Version: 1.4

Type: local

Published: 3/11/2022

Updated: 4/25/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.1

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.2

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2021-26691

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

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

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:alma:linux:mod_http2, p-cpe:/a:alma:linux:mod_md, cpe:/o:alma:linux:8

Required KB Items: Host/local_checks_enabled, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/12/2021

Vulnerability Publication Date: 6/6/2021

CISA Known Exploited Vulnerability Due Dates: 12/15/2021

Reference Information

CVE: CVE-2021-26691, CVE-2021-40438

IAVA: 2021-A-0259-S, 2021-A-0440-S, 2021-A-0482, 2022-A-0029