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FreeBSD : The Update Framwork -- path traversal vulnerability (85d976be-93e3-11ec-aaad-14dae9d5a9d2)

high Nessus Plugin ID 158246

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 85d976be-93e3-11ec-aaad-14dae9d5a9d2 advisory.

 - python-tuf is a Python reference implementation of The Update Framework (TUF). In both clients (`tuf/client` and `tuf/ngclient`), there is a path traversal vulnerability that in the worst case can overwrite files ending in `.json` anywhere on the client system on a call to `get_one_valid_targetinfo()`.
 It occurs because the rolename is used to form the filename, and may contain path traversal characters (ie `../../name.json`). The impact is mitigated by a few facts: It only affects implementations that allow arbitrary rolename selection for delegated targets metadata, The attack requires the ability to A) insert new metadata for the path-traversing role and B) get the role delegated by an existing targets metadata, The written file content is heavily restricted since it needs to be a valid, signed targets file. The file extension is always .json. A fix is available in version 0.19 or newer. There are no workarounds that do not require code changes. Clients can restrict the allowed character set for rolenames, or they can store metadata in files named in a way that is not vulnerable: neither of these approaches is possible without modifying python-tuf. (CVE-2021-41131)

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-2021-41131

http://www.nessus.org/u?9c1b800d

Plugin Details

Severity: High

ID: 158246

File Name: freebsd_pkg_85d976be93e311ecaaad14dae9d5a9d2.nasl

Version: 1.3

Type: local

Published: 2/22/2022

Updated: 11/6/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.3

CVSS v2

Risk Factor: High

Base Score: 8.8

Temporal Score: 6.5

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

CVSS Score Source: CVE-2021-41131

CVSS v3

Risk Factor: High

Base Score: 8.7

Temporal Score: 7.6

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

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:py310-tuf, p-cpe:/a:freebsd:freebsd:py311-tuf, p-cpe:/a:freebsd:freebsd:py37-tuf, p-cpe:/a:freebsd:freebsd:py38-tuf, p-cpe:/a:freebsd:freebsd:py39-tuf, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 2/22/2022

Vulnerability Publication Date: 10/19/2021

Reference Information

CVE: CVE-2021-41131