SB2021052029 - Red Hat Enterprise Linux 8 update for python3
Published: May 20, 2021 Updated: March 24, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) CRLF injection (CVE-ID: CVE-2020-26116)
The vulnerability allows a remote attacker to inject arbitrary data in server response.
The vulnerability exists due to insufficient validation of attacker-supplied data in "http.client". A remote attacker can pass specially crafted data to the application containing CR-LF characters and modify application behavior.
2) Code Injection (CVE-ID: CVE-2020-27619)
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.
3) Buffer overflow (CVE-ID: CVE-2021-3177)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary within the PyCArg_repr in _ctypes/callproc.c. A remote attacker can pass specially crafted input to the Python applications that accept floating-point numbers as untrusted input, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
4) Input validation error (CVE-ID: CVE-2021-23336)
The vulnerability allows a remote attacker to perform web cache spoofing attack.
The vulnerability exists due to insufficient validation of user-supplied input in django.utils.http.limited_parse_qsl() when parsing strings with a semicolon (";"). A remote attacker can pass specially crafted data to the application and perform a spoofing attack.
Remediation
Install update from vendor's website.