Amazon Linux AMI update for python-babel

1) Path traversal

EUVDB-ID: #VU66467

Risk: Medium

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-42771

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to user compromise the affected system.

The vulnerability exists due to input validation error when processing directory traversal sequences within the locale .dat files in Babel.Locale. A remote user can load a malicious .dat file containing serialized Python objects and execute arbitrary code on the system.

Mitigation

Update the affected packages:

noarch:
    python27-babel-0.9.4-5.1.9.amzn1.noarch
    python26-babel-0.9.4-5.1.9.amzn1.noarch

src:
    python-babel-0.9.4-5.1.9.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

python-babel: before 0.9.4-5.1.9

External links

http://alas.aws.amazon.com/ALAS-2023-1720.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.