SB2019110679 - Red Hat Enterprise Linux 8 update for python-urllib3
Published: November 6, 2019
Security Bulletin ID
SB2019110679
Severity
Medium
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) 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.
2) 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.
Remediation
Install update from vendor's website.