Detections
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Amazon Linux 2023 : httpd, httpd-core, httpd-devel (ALAS2023-2023-433)
high Nessus Plugin ID 185718
Language:
Synopsis
The remote Amazon Linux 2023 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-433 advisory.Out-of-bounds Read vulnerability in mod_macro of Apache HTTP Server.This issue affects Apache HTTP Server:
through 2.4.57. (CVE-2023-31122)
A flaw was found in httpd. This flaw allows an attacker opening an HTTP/2 connection with an initial window size of 0 to block handling of that connection indefinitely in the Apache HTTP Server. This vulnerability can exhaust worker resources in the server, similar to the well-known slow loris attack pattern. (CVE-2023-43622)
DescriptionA flaw was found in mod_http2. When a HTTP/2 stream is reset (RST frame) by a client, there is a time window were the request's memory resources were not reclaimed immediately. Instead, de-allocation was deferred to connection close. A client could send new requests and resets, keeping the connection busy and open, causing the memory footprint to keep on growing. On connection close, all resources are reclaimed but the process might run out of memory before connection close.
StatementDuring normal HTTP/2 use, the probability of encountering this issue is very low. The kept memory would not become noticeable before the connection closes or times out.
MitigationMitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. (CVE-2023-45802)
Tenable has extracted the preceding description block directly from the tested product 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
Run 'dnf update httpd --releasever 2023.2.20231113' to update your system.See Also
https://alas.aws.amazon.com/AL2023/ALAS-2023-433.html
https://alas.aws.amazon.com/cve/html/CVE-2023-31122.html
https://alas.aws.amazon.com/cve/html/CVE-2023-43622.html
Plugin Details
Severity: High
ID: 185718
File Name: al2023_ALAS2023-2023-433.nasl
Version: 1.1
Type: local
Agent: unix
Published: 11/15/2023
Updated: 12/11/2024
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2023-43622
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: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:httpd-tools, p-cpe:/a:amazon:linux:mod_ssl-debuginfo, p-cpe:/a:amazon:linux:httpd-tools-debuginfo, p-cpe:/a:amazon:linux:httpd-manual, p-cpe:/a:amazon:linux:mod_ldap, p-cpe:/a:amazon:linux:httpd-debugsource, p-cpe:/a:amazon:linux:mod_lua, p-cpe:/a:amazon:linux:httpd-devel, p-cpe:/a:amazon:linux:mod_session-debuginfo, p-cpe:/a:amazon:linux:httpd-core, p-cpe:/a:amazon:linux:mod_ssl, p-cpe:/a:amazon:linux:httpd-core-debuginfo, p-cpe:/a:amazon:linux:httpd-debuginfo, p-cpe:/a:amazon:linux:mod_ldap-debuginfo, p-cpe:/a:amazon:linux:mod_proxy_html-debuginfo, p-cpe:/a:amazon:linux:mod_lua-debuginfo, p-cpe:/a:amazon:linux:httpd-filesystem, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:mod_session, p-cpe:/a:amazon:linux:mod_proxy_html, p-cpe:/a:amazon:linux:httpd
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 11/9/2023
Vulnerability Publication Date: 10/19/2023