CVE-2021-43527
NSS Heap Overflow in DSA and RSA-PSS Signature Handling
Description
NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures. Applications using NSS for handling signatures encoded within CMS, S/MIME, PKCS \#7, or PKCS \#12 are likely to be impacted. Applications using NSS for certificate validation or other TLS, X.509, OCSP or CRL functionality may be impacted, depending on how they configure NSS. *Note: This vulnerability does NOT impact Mozilla Firefox.* However, email clients and PDF viewers that use NSS for signature verification, such as Thunderbird, LibreOffice, Evolution and Evince are believed to be impacted. This vulnerability affects NSS < 3.73 and NSS < 3.68.1.
INFO
Published Date :
Dec. 8, 2021, 10:15 p.m.
Last Modified :
Feb. 23, 2023, 1:40 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-43527 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-2021-43527
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-2021-43527.
| URL | Resource |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1737470 | Issue Tracking Permissions Required Vendor Advisory |
| https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf | Third Party Advisory |
| https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/ | Vendor Advisory |
| https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/ | Vendor Advisory |
| https://security.gentoo.org/glsa/202212-05 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20211229-0002/ | Third Party Advisory |
| https://www.mozilla.org/security/advisories/mfsa2021-51/ | Vendor Advisory |
| https://www.oracle.com/security-alerts/cpuapr2022.html | Patch Third Party Advisory |
| https://www.starwindsoftware.com/security/sw-20220802-0001/ | 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).
Map Vulnerabilities into Different Layers of the Container Image
Python
Ansible Everyday Utilities
ansible ansible-playbooks security security-tools automation linux bsd redhat-enterprise-linux debian ubuntu centos fedora hardening
Shell Perl 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-2021-43527 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-43527 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]
Feb. 23, 2023
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202212-05 No Types Assigned https://security.gentoo.org/glsa/202212-05 Third Party Advisory -
CVE Modified by [email protected]
Dec. 19, 2022
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202212-05 [No Types Assigned] -
Modified Analysis by [email protected]
Oct. 25, 2022
Action Type Old Value New Value Changed Reference Type https://www.starwindsoftware.com/security/sw-20220802-0001/ No Types Assigned https://www.starwindsoftware.com/security/sw-20220802-0001/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:starwindsoftware:starwind_san_\&_nas:v8r13:*:*:*:*:*:*:* *cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8r13:14398:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 11, 2022
Action Type Old Value New Value Added Reference https://www.starwindsoftware.com/security/sw-20220802-0001/ [No Types Assigned] -
Modified Analysis by [email protected]
Sep. 03, 2022
Action Type Old Value New Value Changed Reference Type https://www.oracle.com/security-alerts/cpuapr2022.html No Types Assigned https://www.oracle.com/security-alerts/cpuapr2022.html Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:communications_policy_management:12.6.0.0.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Apr. 20, 2022
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpuapr2022.html [No Types Assigned] -
Modified Analysis by [email protected]
Mar. 29, 2022
Action Type Old Value New Value Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20211229-0002/ No Types Assigned https://security.netapp.com/advisory/ntap-20211229-0002/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:* versions from (including) 11.0 up to (including) 11.70.1 -
CVE Modified by [email protected]
Mar. 10, 2022
Action Type Old Value New Value Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf [No Types Assigned] -
CVE Modified by [email protected]
Dec. 29, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20211229-0002/ [No Types Assigned] -
Initial Analysis by [email protected]
Dec. 16, 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.mozilla.org/show_bug.cgi?id=1737470 No Types Assigned https://bugzilla.mozilla.org/show_bug.cgi?id=1737470 Issue Tracking, Permissions Required, Vendor Advisory Changed Reference Type https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/ No Types Assigned https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/ Vendor Advisory Changed Reference Type https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/ No Types Assigned https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/ Vendor Advisory Changed Reference Type https://www.mozilla.org/security/advisories/mfsa2021-51/ No Types Assigned https://www.mozilla.org/security/advisories/mfsa2021-51/ Vendor Advisory Added CWE NIST CWE-787 Added CPE Configuration OR *cpe:2.3:a:mozilla:nss:*:*:*:*:*:*:*:* versions up to (excluding) 3.73 *cpe:2.3:a:mozilla:nss_esr:*:*:*:*:*:*:*:* versions up to (excluding) 3.68.1
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-43527 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-2021-43527
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.76 }} 0.22%
score
0.81418
percentile