Amazon Linux AMI update for python-cryptography

1) Error Handling

EUVDB-ID: #VU72036

Risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-23931

CWE-ID: CWE-388 - Error Handling

Exploit availability: No

Description

The vulnerability allows an attacker to misuse Python API.

The vulnerability exists due to a soundness bug within the Cipher.update_into function, which can allow immutable objects (such as bytes) to be mutated. A malicious programmer can misuse Python API to introduce unexpected behavior into the application.

Mitigation

Update the affected packages:

aarch64:
    python3-cryptography-debuginfo-36.0.1-1.amzn2023.0.4.aarch64
    python-cryptography-debugsource-36.0.1-1.amzn2023.0.4.aarch64
    python3-cryptography-36.0.1-1.amzn2023.0.4.aarch64

src:
    python-cryptography-36.0.1-1.amzn2023.0.4.src

x86_64:
    python3-cryptography-debuginfo-36.0.1-1.amzn2023.0.4.x86_64
    python-cryptography-debugsource-36.0.1-1.amzn2023.0.4.x86_64
    python3-cryptography-36.0.1-1.amzn2023.0.4.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

python-cryptography: before 36.0.1-1

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*
• cpe:2.3:o:amazon_web_services:python-cryptography:*:*:*:*:*:amazon_linux_ami:*:*

External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-459.html

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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