Alibaba Cloud Linux 3 : 0074: httpd:2.4 (ALINUX3-SA-2021:0074)

critical Nessus Plugin ID 236525

Synopsis

The remote Alibaba Cloud Linux host is missing one or more security updates.

Description

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2021:0074 advisory.

Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

CVE-2021-26691:
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-2021-40438:
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.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

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

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 236525

File Name: alinux3_sa_2021-0074.nasl

Version: 1.1

Type: local

Family: Alibaba Cloud Linux Local Security Checks

Published: 5/14/2025

Updated: 5/14/2025

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:alibabacloud:alibaba_cloud_linux_3:mod_ssl-debuginfo, cpe:/o:alibabacloud:alibaba_cloud_linux_3, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:httpd-filesystem, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:mod_ldap, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:mod_ldap-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:httpd-manual, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:httpd-devel, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:mod_proxy_html, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:mod_session, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:httpd-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:httpd-tools-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:mod_ssl, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:httpd-debugsource, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:httpd, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:httpd-tools, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:mod_session-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:mod_proxy_html-debuginfo

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/13/2021

Vulnerability Publication Date: 6/1/2021

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

Reference Information

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

Detections

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