CVE-2021-43572
Stark Bank ECDSA Signature Forgery
Description
The verify function in the Stark Bank Python ECDSA library (aka starkbank-escada or ecdsa-python) before 2.0.1 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.
INFO
Published Date :
Nov. 9, 2021, 10:15 p.m.
Last Modified :
Nov. 21, 2024, 6:29 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | HIGH | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
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-2021-43572.
| URL | Resource |
|---|---|
| https://github.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17f | Patch Third Party Advisory |
| https://github.com/starkbank/ecdsa-python/releases/tag/v2.0.1 | Release Notes Third Party Advisory |
| https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/ | Exploit Third Party Advisory |
| https://github.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17f | Patch Third Party Advisory |
| https://github.com/starkbank/ecdsa-python/releases/tag/v2.0.1 | Release Notes Third Party Advisory |
| https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/ | Exploit Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-43572 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-2021-43572
weaknesses.
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-2021-43572 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-43572 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 af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17f Added Reference https://github.com/starkbank/ecdsa-python/releases/tag/v2.0.1 Added Reference https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/ -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Mar. 24, 2022
Action Type Old Value New Value Changed Reference Type https://github.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17f No Types Assigned https://github.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17f Patch, Third Party Advisory -
CVE Modified by [email protected]
Feb. 20, 2022
Action Type Old Value New Value Changed Description The verify function in the Stark Bank Python ECDSA library (ecdsa-python) 2.0.0 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages. The verify function in the Stark Bank Python ECDSA library (aka starkbank-escada or ecdsa-python) before 2.0.1 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages. Added Reference https://github.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17f [No Types Assigned] -
Reanalysis by [email protected]
Feb. 17, 2022
Action Type Old Value New Value Changed Reference Type https://github.com/starkbank/ecdsa-python/releases/tag/v2.0.1 Third Party Advisory https://github.com/starkbank/ecdsa-python/releases/tag/v2.0.1 Release Notes, Third Party Advisory Changed CPE Configuration OR *cpe:2.3:a:starkbank:ecdsa-python:2.0.0:*:*:*:*:*:*:* OR *cpe:2.3:a:starkbank:ecdsa-python:*:*:*:*:*:*:*:* versions up to (excluding) 2.0.1 -
Initial Analysis by [email protected]
Nov. 12, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/starkbank/ecdsa-python/releases/tag/v2.0.1 No Types Assigned https://github.com/starkbank/ecdsa-python/releases/tag/v2.0.1 Third Party Advisory Changed Reference Type https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/ No Types Assigned https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/ Exploit, Third Party Advisory Added CWE NIST CWE-347 Added CPE Configuration OR *cpe:2.3:a:starkbank:ecdsa-python:2.0.0:*:*:*:*:*:*:*
Vulnerability Scoring Details
Base CVSS Score: 9.8
Base CVSS Score: 7.5
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.24 }} 0.01%
score
0.47410
percentile