CVE-2021-4209
GnuTLS NULL Pointer Dereference and Nettle Hash Update Denial of Service
Description
A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update functions internally call memcpy, providing zero-length input may cause undefined behavior. This flaw leads to a denial of service after authentication in rare circumstances.
INFO
Published Date :
Aug. 24, 2022, 4:15 p.m.
Last Modified :
Oct. 27, 2022, 4:57 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.8
Public PoC/Exploit Available at Github
CVE-2021-4209 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-2021-4209
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-2021-4209.
| URL | Resource |
|---|---|
| https://access.redhat.com/security/cve/CVE-2021-4209 | Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2044156 | Issue Tracking Third Party Advisory |
| https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da61300568 | Patch Third Party Advisory |
| https://gitlab.com/gnutls/gnutls/-/issues/1306 | Third Party Advisory |
| https://gitlab.com/gnutls/gnutls/-/merge_requests/1503 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20220915-0005/ | 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).
None
Dockerfile Roff Java
None
Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-4209 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-4209 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 -
Modified Analysis by [email protected]
Oct. 27, 2022
Action Type Old Value New Value Changed Reference Type https://security.netapp.com/advisory/ntap-20220915-0005/ No Types Assigned https://security.netapp.com/advisory/ntap-20220915-0005/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* *cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:netapp:hci_bootstrap_os:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Sep. 15, 2022
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20220915-0005/ [No Types Assigned] -
Initial Analysis by [email protected]
Aug. 29, 2022
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://access.redhat.com/security/cve/CVE-2021-4209 No Types Assigned https://access.redhat.com/security/cve/CVE-2021-4209 Third Party Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2044156 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2044156 Issue Tracking, Third Party Advisory Changed Reference Type https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da61300568 No Types Assigned https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da61300568 Patch, Third Party Advisory Changed Reference Type https://gitlab.com/gnutls/gnutls/-/issues/1306 No Types Assigned https://gitlab.com/gnutls/gnutls/-/issues/1306 Third Party Advisory Changed Reference Type https://gitlab.com/gnutls/gnutls/-/merge_requests/1503 No Types Assigned https://gitlab.com/gnutls/gnutls/-/merge_requests/1503 Third Party Advisory Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:* versions up to (excluding) 3.7.3 Added CPE Configuration OR *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-2021-4209 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-2021-4209
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.21 }} 0.01%
score
0.58321
percentile