SB2020112330 - Remote code execution in Python

Description

This security bulletin contains information about 1 vulnerability.

1) Code Injection (CVE-ID: CVE-2020-27619)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to Python executed eval() function on the code, retrieved via HTTP protocol in Lib/test/multibytecodec_support.py CJK codec tests. A remote attacker with ability to intercept network traffic can perform a Man-in-the-Middle (MitM) attack and execute arbitrary Python code on the system.

Remediation

Install update from vendor's website.

References

• https://bugs.python.org/issue41944
• https://github.com/python/cpython/commit/2ef5caa58febc8968e670e39e3d37cf8eef3cab8
• https://github.com/python/cpython/commit/43e523103886af66d6c27cd72431b5d9d14cd2a9
• https://github.com/python/cpython/commit/6c6c256df3636ff6f6136820afaefa5a10a3ac33
• https://github.com/python/cpython/commit/b664a1df4ee71d3760ab937653b10997081b1794
• https://github.com/python/cpython/commit/e912e945f2960029d039d3390ea08835ad39374b
• https://security.netapp.com/advisory/ntap-20201123-0004/