CVE-2021-21373
"Nimble TLS Downgrade Man-in-the-Middle (MitM) Vulnerability"
Description
Nimble is a package manager for the Nim programming language. In Nim release versions before versions 1.2.10 and 1.4.4, "nimble refresh" fetches a list of Nimble packages over HTTPS by default. In case of error it falls back to a non-TLS URL http://irclogs.nim-lang.org/packages.json. An attacker able to perform MitM can deliver a modified package list containing malicious software packages. If the packages are installed and used the attack escalates to untrusted code execution.
INFO
Published Date :
March 26, 2021, 10:15 p.m.
Last Modified :
March 31, 2021, 3:52 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.3
Exploitability Score :
1.6
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-2021-21373.
| URL | Resource |
|---|---|
| https://consensys.net/diligence/vulnerabilities/nim-insecure-ssl-tls-defaults-remote-code-execution/ | Exploit Third Party Advisory |
| https://github.com/nim-lang/nimble/blob/master/changelog.markdown#0130 | Release Notes Third Party Advisory |
| https://github.com/nim-lang/security/security/advisories/GHSA-8w52-r35x-rgp8 | 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-2021-21373 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-21373 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]
Mar. 31, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Changed Reference Type https://consensys.net/diligence/vulnerabilities/nim-insecure-ssl-tls-defaults-remote-code-execution/ No Types Assigned https://consensys.net/diligence/vulnerabilities/nim-insecure-ssl-tls-defaults-remote-code-execution/ Exploit, Third Party Advisory Changed Reference Type https://github.com/nim-lang/nimble/blob/master/changelog.markdown#0130 No Types Assigned https://github.com/nim-lang/nimble/blob/master/changelog.markdown#0130 Release Notes, Third Party Advisory Changed Reference Type https://github.com/nim-lang/security/security/advisories/GHSA-8w52-r35x-rgp8 No Types Assigned https://github.com/nim-lang/security/security/advisories/GHSA-8w52-r35x-rgp8 Third Party Advisory Added CWE NIST CWE-295 Added CPE Configuration OR *cpe:2.3:a:nim-lang:nim:*:*:*:*:*:*:*:* versions up to (excluding) 1.2.10 *cpe:2.3:a:nim-lang:nim:*:*:*:*:*:*:*:* versions from (including) 1.4.0 up to (excluding) 1.4.4
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-21373 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-2021-21373
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.08 }} -0.00%
score
0.32386
percentile