Amazon Linux AMI update for libreswan

1) Reachable assertion

EUVDB-ID: #VU88534

Risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-3652

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

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

The vulnerability exists due to a reachable assertion within the compute_proto_keymat() function when handling IKEv1 packets within the default AH/ESP responder. A remote authenticated user can send specially crafted packets to the server and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

aarch64:
    libreswan-debuginfo-4.12-3.amzn2023.0.2.aarch64
    libreswan-4.12-3.amzn2023.0.2.aarch64
    libreswan-debugsource-4.12-3.amzn2023.0.2.aarch64

src:
    libreswan-4.12-3.amzn2023.0.2.src

x86_64:
    libreswan-debuginfo-4.12-3.amzn2023.0.2.x86_64
    libreswan-4.12-3.amzn2023.0.2.x86_64
    libreswan-debugsource-4.12-3.amzn2023.0.2.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

libreswan: All versions

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*
• cpe:2.3:a:amazon_web_services:libreswan:*:*:*:*:*:amazon_linux_ami:*:*

External links

https://alas.aws.amazon.com/AL2023/ALAS-2024-621.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.