Amazon Linux AMI update for kernel



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-1206
CWE-ID CWE-400
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Amazon Linux AMI
Operating systems & Components / Operating system

kernel
Operating systems & Components / Operating system package or component

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Resource exhaustion

EUVDB-ID: #VU77953

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-1206

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to a hash collision flaw in the IPv6 connection lookup table in the Linux kernel’s IPv6 functionality when an attacker makes a new kind of SYN flood attack. A remote attacker can increase the CPU usage of the server that accepts IPV6 connections up to 95%.

Mitigation

Update the affected packages:

aarch64:
    kernel-libbpf-6.1.34-58.102.amzn2023.aarch64
    bpftool-6.1.34-58.102.amzn2023.aarch64
    kernel-tools-devel-6.1.34-58.102.amzn2023.aarch64
    bpftool-debuginfo-6.1.34-58.102.amzn2023.aarch64
    kernel-livepatch-6.1.34-58.102-1.0-0.amzn2023.aarch64
    kernel-tools-debuginfo-6.1.34-58.102.amzn2023.aarch64
    perf-debuginfo-6.1.34-58.102.amzn2023.aarch64
    kernel-headers-6.1.34-58.102.amzn2023.aarch64
    python3-perf-debuginfo-6.1.34-58.102.amzn2023.aarch64
    kernel-libbpf-devel-6.1.34-58.102.amzn2023.aarch64
    kernel-tools-6.1.34-58.102.amzn2023.aarch64
    python3-perf-6.1.34-58.102.amzn2023.aarch64
    kernel-libbpf-static-6.1.34-58.102.amzn2023.aarch64
    perf-6.1.34-58.102.amzn2023.aarch64
    kernel-6.1.34-58.102.amzn2023.aarch64
    kernel-debuginfo-6.1.34-58.102.amzn2023.aarch64
    kernel-debuginfo-common-aarch64-6.1.34-58.102.amzn2023.aarch64
    kernel-devel-6.1.34-58.102.amzn2023.aarch64

src:
    kernel-6.1.34-58.102.amzn2023.src

x86_64:
    kernel-tools-devel-6.1.34-58.102.amzn2023.x86_64
    python3-perf-6.1.34-58.102.amzn2023.x86_64
    kernel-tools-6.1.34-58.102.amzn2023.x86_64
    kernel-libbpf-static-6.1.34-58.102.amzn2023.x86_64
    python3-perf-debuginfo-6.1.34-58.102.amzn2023.x86_64
    perf-debuginfo-6.1.34-58.102.amzn2023.x86_64
    bpftool-debuginfo-6.1.34-58.102.amzn2023.x86_64
    kernel-tools-debuginfo-6.1.34-58.102.amzn2023.x86_64
    kernel-headers-6.1.34-58.102.amzn2023.x86_64
    bpftool-6.1.34-58.102.amzn2023.x86_64
    kernel-livepatch-6.1.34-58.102-1.0-0.amzn2023.x86_64
    kernel-libbpf-devel-6.1.34-58.102.amzn2023.x86_64
    kernel-libbpf-6.1.34-58.102.amzn2023.x86_64
    perf-6.1.34-58.102.amzn2023.x86_64
    kernel-6.1.34-58.102.amzn2023.x86_64
    kernel-debuginfo-6.1.34-58.102.amzn2023.x86_64
    kernel-debuginfo-common-x86_64-6.1.34-58.102.amzn2023.x86_64
    kernel-devel-6.1.34-58.102.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: All versions

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-233.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.



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