Debian LTS: Security Advisory for python-urllib3 (DLA-2686-1)

Published: 2021-06-16 03:00:13
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:N

Summary:
The remote host is missing an update for the 'python-urllib3' Linux Distribution Package(s) announced via the DLA-2686-1 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
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().

Affected Versions:
'python-urllib3' Linux Distribution Package(s) on Debian Linux.

Recommendations:
For Debian 9 stretch, these problems have been fixed in version 1.19.1-1+deb9u1. We recommend that you upgrade your python-urllib3 Linux Distribution Packages.

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2018-20060
https://nvd.nist.gov/vuln/detail/CVE-2019-11236
https://nvd.nist.gov/vuln/detail/CVE-2019-11324
https://nvd.nist.gov/vuln/detail/CVE-2020-26137

References:

https://lists.debian.org/debian-lts-announce/2021/06/msg00015.html
https://security-tracker.debian.org/tracker/DLA-2686-1

Severity
Medium
CVSS Score
6.4
Published
2021-06-16
Modified
2021-06-16
Category
Debian Local Security Checks

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