Amazon Linux AMI update for httpd

Published: 2024-08-06 | Updated: 2024-12-06

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-25690 CVE-2023-27522
CWE-ID	CWE-113
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available.
Vulnerable software	Amazon Linux AMI Operating systems & Components / Operating system httpd Operating systems & Components / Operating system package or component
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) HTTP response splitting

EUVDB-ID: #VU73107

Risk: Medium

CVSSv4.0: 2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2023-25690

CWE-ID: CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform HTTP splitting attacks.

The vulnerability exists due to software does not correclty process CRLF character sequences in mod_rewrite and mod_proxy. A remote attacker can send specially crafted request containing CRLF sequence and make the application to send a split HTTP response.

Successful exploitation of the vulnerability may allow an attacker perform cache poisoning attack.

Mitigation

Update the affected packages:

aarch64:
    mod_ldap-debuginfo-2.4.56-1.amzn2023.aarch64
    mod_proxy_html-debuginfo-2.4.56-1.amzn2023.aarch64
    mod_lua-2.4.56-1.amzn2023.aarch64
    mod_session-2.4.56-1.amzn2023.aarch64
    httpd-tools-2.4.56-1.amzn2023.aarch64
    httpd-tools-debuginfo-2.4.56-1.amzn2023.aarch64
    mod_ldap-2.4.56-1.amzn2023.aarch64
    httpd-debuginfo-2.4.56-1.amzn2023.aarch64
    mod_proxy_html-2.4.56-1.amzn2023.aarch64
    httpd-debugsource-2.4.56-1.amzn2023.aarch64
    mod_ssl-debuginfo-2.4.56-1.amzn2023.aarch64
    httpd-core-2.4.56-1.amzn2023.aarch64
    mod_session-debuginfo-2.4.56-1.amzn2023.aarch64
    httpd-2.4.56-1.amzn2023.aarch64
    mod_ssl-2.4.56-1.amzn2023.aarch64
    mod_lua-debuginfo-2.4.56-1.amzn2023.aarch64
    httpd-devel-2.4.56-1.amzn2023.aarch64
    httpd-core-debuginfo-2.4.56-1.amzn2023.aarch64

noarch:
    httpd-filesystem-2.4.56-1.amzn2023.noarch
    httpd-manual-2.4.56-1.amzn2023.noarch

src:
    httpd-2.4.56-1.amzn2023.src

x86_64:
    mod_session-debuginfo-2.4.56-1.amzn2023.x86_64
    httpd-devel-2.4.56-1.amzn2023.x86_64
    mod_ldap-debuginfo-2.4.56-1.amzn2023.x86_64
    mod_ssl-debuginfo-2.4.56-1.amzn2023.x86_64
    mod_lua-2.4.56-1.amzn2023.x86_64
    httpd-debugsource-2.4.56-1.amzn2023.x86_64
    httpd-debuginfo-2.4.56-1.amzn2023.x86_64
    mod_ldap-2.4.56-1.amzn2023.x86_64
    mod_proxy_html-2.4.56-1.amzn2023.x86_64
    mod_lua-debuginfo-2.4.56-1.amzn2023.x86_64
    mod_proxy_html-debuginfo-2.4.56-1.amzn2023.x86_64
    mod_ssl-2.4.56-1.amzn2023.x86_64
    httpd-tools-2.4.56-1.amzn2023.x86_64
    httpd-2.4.56-1.amzn2023.x86_64
    httpd-tools-debuginfo-2.4.56-1.amzn2023.x86_64
    mod_session-2.4.56-1.amzn2023.x86_64
    httpd-core-debuginfo-2.4.56-1.amzn2023.x86_64
    httpd-core-2.4.56-1.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

httpd: before 2.4.56-1

CPE2.3

External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-136.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) HTTP response splitting

EUVDB-ID: #VU73106