CVE Tools
Sign in

CVE-2021-22901

curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session ticket arrives over a connection. A malicious server can u...

Published: Jun 11, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDU csafCWE-416
NVD MITRE
8.1CVSSHIGH
EPSS Score
60.1%
Top 1.0%
CISA KEV
Not in KEV
Exploits
2 Known
Remediation
Patch Available

Description

Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version >= V3.1.0 and < V3.1.5 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant). These GNU/Linux vulnerabilities have been externally identified. Siemens has released new versions for the affected products and recommends to update to the latest versions. Note: This SSA advises vulnerabilities for firmware version V3.1 only; for versions < V3.1 refer to Siemens Security Bulletin SSB-439005 ( https://cert-portal.siemens.com/productcert/html/ssb-439005.html).

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
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-416

Affected Products

Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
JBoss Core ServicesRed Hat Inc.
On-premDev Tool
DevTools & CI / ide-editor
cURLDaniel Stenberg
LibraryLibrary
OSS Libraries / generic-library
Альт 8 СПАО «ИВК»
On-premOS
Operating Systems / linux-distro
IBM Aspera Desktop ClientIBM Corp.
Mixed
Databases / relational
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
red hat inc.commercialUSOperating Systemsaka red hat
daniel stenbergindividual-devOSS Librariesaka daniel.haxx.se, daniel stenberg (curl author)
ао «ивк»commercialRUOperating Systemsaka ivk
ibm corp.commercialUSDatabasesaka ibm, ibm corporation
and 29 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

2 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://access.redhat.com/security/cve/CVE-2021-22901&#13;
access.redhat.com
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22901&#13;
cve.mitre.org
https://www.ibm.com/support/pages/node/6494763
ibm.com
and 21 more references View all →

Timeline

Published
Jun 11, 2021
Last Updated
Nov 21, 2024

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-22901 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