Amazon Linux AMI update for squid

1) Uncontrolled Recursion

EUVDB-ID: #VU84442

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-50269

CWE-ID: CWE-674 - Uncontrolled Recursion

Exploit availability: No

Description

The vulnerability allows a remote client to perform a denial of service (DoS) attack.

The vulnerability exists due to uncontrolled recursion when parsing HTTP requests. A remote client can send a specially crafted HTTP request with the a large X-Forwarded-For header, when the follow_x_forwarded_for feature is configured, and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

aarch64:
    squid-debuginfo-5.8-1.amzn2023.0.4.aarch64
    squid-5.8-1.amzn2023.0.4.aarch64
    squid-debugsource-5.8-1.amzn2023.0.4.aarch64

src:
    squid-5.8-1.amzn2023.0.4.src

x86_64:
    squid-debuginfo-5.8-1.amzn2023.0.4.x86_64
    squid-5.8-1.amzn2023.0.4.x86_64
    squid-debugsource-5.8-1.amzn2023.0.4.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

squid: before 5.8-1

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:
• cpe:2.3:o:amazon_web_services:squid:*:*:*:*:*:amazon_linux_ami:*:

External links

http://alas.aws.amazon.com/AL2023/ALAS-2024-467.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.