CVE-2021-20305
Nettle Elliptic Curve Signature Verification Vulnerability
Description
A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.
INFO
Published Date :
April 5, 2021, 10:15 p.m.
Last Modified :
Nov. 7, 2023, 3:29 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
2.2
Public PoC/Exploit Available at Github
CVE-2021-20305 has a 2 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-20305
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
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-2021-20305.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1942533 | Issue Tracking Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2021/09/msg00008.html | Mailing List Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQKWVVMAIDAJ7YAA3VVO32BHLDOH2E63/ | |
| https://security.gentoo.org/glsa/202105-31 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20211022-0002/ | Third Party Advisory |
| https://www.debian.org/security/2021/dsa-4933 | 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).
AWS ECR Vulnerability Scan CLI
Go
None
Shell Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-20305 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-20305 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 -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQKWVVMAIDAJ7YAA3VVO32BHLDOH2E63/ [No types assigned] Removed Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/MQKWVVMAIDAJ7YAA3VVO32BHLDOH2E63/ -
Modified Analysis by [email protected]
Dec. 06, 2021
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/09/msg00008.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/09/msg00008.html Mailing List, Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20211022-0002/ No Types Assigned https://security.netapp.com/advisory/ntap-20211022-0002/ Third Party Advisory Changed Reference Type https://www.debian.org/security/2021/dsa-4933 No Types Assigned https://www.debian.org/security/2021/dsa-4933 Third Party Advisory Added CWE NIST CWE-787 Added CPE Configuration OR *cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* *cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 22, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20211022-0002/ [No Types Assigned] -
CVE Modified by [email protected]
Sep. 18, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/09/msg00008.html [No Types Assigned] -
CVE Modified by [email protected]
Jun. 19, 2021
Action Type Old Value New Value Added Reference https://www.debian.org/security/2021/dsa-4933 [No Types Assigned] -
Modified Analysis by [email protected]
Jun. 02, 2021
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/MQKWVVMAIDAJ7YAA3VVO32BHLDOH2E63/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/MQKWVVMAIDAJ7YAA3VVO32BHLDOH2E63/ Third Party Advisory Changed Reference Type https://security.gentoo.org/glsa/202105-31 No Types Assigned https://security.gentoo.org/glsa/202105-31 Third Party Advisory Changed CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jun. 01, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/MQKWVVMAIDAJ7YAA3VVO32BHLDOH2E63/ [No Types Assigned] -
CVE Modified by [email protected]
May. 26, 2021
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202105-31 [No Types Assigned] -
Reanalysis by [email protected]
Apr. 12, 2021
Action Type Old Value New Value Removed CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P) Removed CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H -
Initial Analysis by [email protected]
Apr. 09, 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://bugzilla.redhat.com/show_bug.cgi?id=1942533 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1942533 Issue Tracking, Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:nettle_project:nettle:*:*:*:*:*:*:*:* versions up to (excluding) 3.7.2 Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-20305 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-2021-20305
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.96 }} 0.09%
score
0.81532
percentile