SB2020042850 - Red Hat Enterprise Linux 8 update for the python27:2.7 module

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Main Vulnerability Database SB2020042850

SB2020042850 - Red Hat Enterprise Linux 8 update for the python27:2.7 module

Published: April 28, 2020 Updated: June 20, 2021

Security Bulletin ID SB2020042850
Severity
High
Patch available
YES
Number of vulnerabilities 6
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 17% Medium 67% Low 17%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 6 secuirty vulnerabilities.


1) Credentials management (CVE-ID: CVE-2018-18074)

The vulnerability allows a remote attacker to access sensitive information on a targeted system.

The vulnerability exists due to the software does not remove the HTTP Authorization header when following an HTTPS-to-HTTP redirect with the same hostname. A remote attacker who is able to perform a man-in-the-middle attack can sniff network traffic in transit between two systems on the targeted network and access sensitive information, such as user credentials.

2) Information disclosure (CVE-ID: CVE-2018-20060)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to Authorization HTTP header is not removed from the HTTP request during request redirection in "urllib3/util/retry.py". A remote attacker can intercept the request and gain access to sensitive information, passed via Authorization HTTP header.


3) Information disclosure (CVE-ID: CVE-2018-20852)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the "http.cookiejar.DefaultPolicy.domain_return_ok" in the "Lib/http/cookiejar.py" file returns incorrect results during cookie domain checks. A remote attacker can trick a victim to execute a program that uses the "http.cookiejar.DefaultPolicy" to make an HTTP connection to an attacker-controlled server with a hostname that has another valid hostname as a suffix.

Successful exploitation of this vulnerability can allow an attacker to gain unauthorized access to sensitive information on the system, such as existing cookies.

4) CRLF injection (CVE-ID: CVE-2019-11236)

The vulnerability allows a remote attacker to perform a spoofing attack.

The vulnerability exists due to insufficient filtration of user-supplied data passed via HTTP request parameters to urllib3 library. A remote attacker can pass specially crafted data that contains CRLF sequences and perform a spoofing attack.


5) Improper Certificate Validation (CVE-ID: CVE-2019-11324)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the urllib3 library for Python mishandles certain cases where the desired set of CA certificates is different from the OS store of CA certificates. A remote attacker can cause the certificates to be considered trusted contrary to expectations. This is related to use of the "ssl_context", "ca_certs" or "ca_certs_dir" argument.

6) Input validation error (CVE-ID: CVE-2019-16056)

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to insufficient validation of user-supplied input when processing multiple occurrences of the "@" character in an email address. An application that uses the email module and implements some kind of checks on the From/To headers of a message could be tricked into accepting an email address that should be denied.


Remediation

Install update from vendor's website.

References