Debian Security Advisory
DLA-2686-1 python-urllib3 -- LTS security update
- Date Reported:
- 28 Jun 2021
- Affected Packages:
- python-urllib3
- Vulnerable:
- Yes
- Security database references:
- In Mitre's CVE dictionary: CVE-2018-20060, CVE-2019-11236, CVE-2019-11324, CVE-2020-26137.
- More information:
-
Several vulnerabilities were discovered in python-urllib3, a HTTP client for Python.
- CVE-2018-20060
Urllib3 does not remove the Authorization HTTP header when following a cross-origin redirect (i.e., a redirect that differs in host, port, or scheme). This can allow for credentials in the Authorization header to be exposed to unintended hosts or transmitted in cleartext.
- CVE-2019-11236
CRLF injection is possible if the attacker controls the request parameter.
- CVE-2019-11324
Urllib3 mishandles certain cases where the desired set of CA certificates is different from the OS store of CA certificates, which results in SSL connections succeeding in situations where a verification failure is the correct outcome. This is related to use of the ssl_context, ca_certs, or ca_certs_dir argument.
- CVE-2020-26137
Urllib3 allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of putrequest().
For Debian 9 stretch, these problems have been fixed in version 1.19.1-1+deb9u1.
We recommend that you upgrade your python-urllib3 packages.
For the detailed security status of python-urllib3 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/python-urllib3
Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS
- CVE-2018-20060