Amazon Linux AMI update for zstd

1) Buffer overflow

EUVDB-ID: #VU74201

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-2022-4899

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in util.c when processing empty arguments in the command line tool. A remote attacker can pass an empty string as an argument, trigger buffer underflow and crash the application.

Mitigation

Update the affected packages:

aarch64:
    zstd-debuginfo-1.5.2-1.amzn2023.0.3.aarch64
    libzstd-debuginfo-1.5.2-1.amzn2023.0.3.aarch64
    libzstd-static-1.5.2-1.amzn2023.0.3.aarch64
    libzstd-1.5.2-1.amzn2023.0.3.aarch64
    zstd-1.5.2-1.amzn2023.0.3.aarch64
    libzstd-devel-1.5.2-1.amzn2023.0.3.aarch64
    zstd-debugsource-1.5.2-1.amzn2023.0.3.aarch64

src:
    zstd-1.5.2-1.amzn2023.0.3.src

x86_64:
    zstd-debuginfo-1.5.2-1.amzn2023.0.3.x86_64
    libzstd-debuginfo-1.5.2-1.amzn2023.0.3.x86_64
    libzstd-static-1.5.2-1.amzn2023.0.3.x86_64
    libzstd-devel-1.5.2-1.amzn2023.0.3.x86_64
    zstd-debugsource-1.5.2-1.amzn2023.0.3.x86_64
    libzstd-1.5.2-1.amzn2023.0.3.x86_64
    zstd-1.5.2-1.amzn2023.0.3.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

zstd: before 1.5.2-1

CPE2.3

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

External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-244.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.