CVE Tools
Sign in

CVE-2021-43527

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 signa...

Published: Dec 8, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDU csafCWE-787
9.8CRITICAL
NVD MITRE
EPSS Score
17.6%
Top 3.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Palo Alto Networks has published [1] information on vulnerabilities in PAN-OS. This advisory lists the related Siemens Industrial products affected by these vulnerabilities. Siemens has released a new version of Palo Alto Networks Virtual NGFW for RUGGEDCOM APE1808 and recommends to update to the latest version. Customers are advised to consult and implement the workarounds provided in Palo Alto Networks' upstream security notifications. [1] https://security.paloaltonetworks.com/

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-787

Affected Products

oracle
commercial·USaka oracle corp.
communications cloud native core binding support function
Communications
communications cloud native core network repository functionOn-premDatabase
Databases / data-warehouse-analytics
communications cloud native core network slice selection functionOn-premWeb App
Communications
communications policy managementOn-premDatabase
Databases / relational
Mozilla
oss-project·USaka mozilla corp.
NSS
Consumer Software
nss esr
Consumer Software
netapp
commercial·US
cloud backup
Hardware Firmware
e-series santricity os controller
Hardware Firmware
starwindsoftware
commercialaka command center, starwind virtual san, starwind san & nas
starwind san \& nasOn-prem
Cloud & SaaS / virtualization
starwind virtual sanOn-prem
Cloud & SaaS / virtualization
Red Hat Inc.
commercial·USaka red hat
Red Hat Enterprise LinuxOn-premOS
Operating Systems / linux-distro
Red Hat VirtualizationOn-prem
Operating Systems / linux-distro
Сообщество свободного программного обеспечения
oss-projectaka fsf
Debian GNU/LinuxOn-premOS
Operating Systems / linux-distro
and 7 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-43527?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://cert-portal.siemens.com/productcert/csaf/ssa-455250.json
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-455250.html
cert-portal.siemens.com
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2024/icsa-24-102-04.json
raw.githubusercontent.com
and 28 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-43527 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows