CVE-2021-41131
Python-tuf Path Traversal Vulnerability
Description
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.
INFO
Published Date :
Oct. 19, 2021, 6:15 p.m.
Last Modified :
Oct. 22, 2021, 8:44 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.8
Exploitability Score :
2.2
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-41131
.
URL | Resource |
---|---|
https://github.com/theupdateframework/python-tuf/commit/4ad7ae48fda594b640139c3b7eae21ed5155a102 | Patch Third Party Advisory |
https://github.com/theupdateframework/python-tuf/issues/1527 | Issue Tracking Third Party Advisory |
https://github.com/theupdateframework/python-tuf/security/advisories/GHSA-wjw6-2cqr-j4qr | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-41131
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-41131
vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Oct. 22, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:C/A:C) Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H Changed Reference Type https://github.com/theupdateframework/python-tuf/commit/4ad7ae48fda594b640139c3b7eae21ed5155a102 No Types Assigned https://github.com/theupdateframework/python-tuf/commit/4ad7ae48fda594b640139c3b7eae21ed5155a102 Patch, Third Party Advisory Changed Reference Type https://github.com/theupdateframework/python-tuf/issues/1527 No Types Assigned https://github.com/theupdateframework/python-tuf/issues/1527 Issue Tracking, Third Party Advisory Changed Reference Type https://github.com/theupdateframework/python-tuf/security/advisories/GHSA-wjw6-2cqr-j4qr No Types Assigned https://github.com/theupdateframework/python-tuf/security/advisories/GHSA-wjw6-2cqr-j4qr Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:linuxfoundation:the_update_framework:*:*:*:*:*:python:*:* versions up to (including) 0.18.1
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-41131
is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-41131
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.14 }} 0.02%
score
0.50102
percentile