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 1. Plugins
 2. Nessus
 3. 202191

 1. Nessus


CBL MARINER 2.0 SECURITY UPDATE: PYTHON-URLLIB3 (CVE-2024-37891)

MEDIUM NESSUS PLUGIN ID 202191

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SYNOPSIS

The remote CBL Mariner host is missing one or more security updates.


DESCRIPTION

The version of python-urllib3 installed on the remote CBL Mariner 2.0 host is
prior to tested version. It is, therefore, affected by a vulnerability as
referenced in the CVE-2024-37891 advisory.

- urllib3 is a user-friendly HTTP client library for Python. When using
urllib3's proxy support with `ProxyManager`, the `Proxy-Authorization` header is
only sent to the configured proxy, as expected.
However, when sending HTTP requests *without* using urllib3's proxy support,
it's possible to accidentally configure the `Proxy-Authorization` header even
though it won't have any effect as the request is not using a forwarding proxy
or a tunneling proxy. In those cases, urllib3 doesn't treat the `Proxy-
Authorization` HTTP header as one carrying authentication material and thus
doesn't strip the header on cross-origin redirects. Because this is a highly
unlikely scenario, we believe the severity of this vulnerability is low for
almost all users. Out of an abundance of caution urllib3 will automatically
strip the `Proxy-Authorization` header during cross-origin redirects to avoid
the small chance that users are doing this on accident. Users should use
urllib3's proxy support or disable automatic redirects to achieve safe
processing of the `Proxy-Authorization` header, but we still decided to strip
the header by default in order to further protect users who aren't using the
correct approach. We believe the number of usages affected by this advisory is
low. It requires all of the following to be true to be exploited: 1. Setting the
`Proxy-Authorization` header without using urllib3's built-in proxy support. 2.
Not disabling HTTP redirects. 3. Either not using an HTTPS origin server or for
the proxy or target origin to redirect to a malicious origin. Users are advised
to update to either version 1.26.19 or version 2.2.2. Users unable to upgrade
May use the `Proxy-Authorization` header with urllib3's `ProxyManager`, disable
HTTP redirects using `redirects=False` when sending requests, or not user the
`Proxy-Authorization` header as mitigations. (CVE-2024-37891)

Note that Nessus has not tested for this issue but has instead relied only on
the application's self-reported version number.


SOLUTION

Update the affected packages.


SEE ALSO

https://nvd.nist.gov/vuln/detail/CVE-2024-37891

PLUGIN DETAILS

Severity: Medium

ID: 202191

File Name: mariner_CVE-2024-37891.nasl

Version: 1.1

Type: local

Family: MarinerOS Local Security Checks

Published: 7/11/2024

Updated: 7/11/2024





Supported Sensors: Nessus



RISK INFORMATION



VPR

Risk Factor: Medium

Score: 4.4

CVSS V2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: CVSS2#AV:N/AC:H/Au:M/C:C/I:N/A:N



CVSS Score Source: CVE-2024-37891

CVSS V3

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.9

Vector: CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C



VULNERABILITY INFORMATION

CPE: x-cpe:/o:microsoft:cbl-mariner,
p-cpe:/a:microsoft:cbl-mariner:python3-urllib3

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/CBLMariner/release,
Host/CBLMariner/rpm-list



Exploit Ease: No known exploits are available



Patch Publication Date: 7/9/2024

Vulnerability Publication Date: 6/17/2024



REFERENCE INFORMATION

CVE: CVE-2024-37891


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