// For flags

CVE-2016-4970

netty: Infinite loop vulnerability when handling renegotiation using SslProvider.OpenSsl

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

handler/ssl/OpenSslEngine.java in Netty 4.0.x before 4.0.37.Final and 4.1.x before 4.1.1.Final allows remote attackers to cause a denial of service (infinite loop).

handler/ssl/OpenSslEngine.java en Netty 4.0.x en versiones anteriores a 4.0.37.Final y 4.1.x en versiones anteriores a 4.1.1.Final permite a los atacantes remotos provocar una denegación de servicio (bucle infinito).

Red Hat JBoss Data Grid is a distributed in-memory data grid, based on Infinispan. This release of Red Hat JBoss Data Grid 7.1.0 serves as a replacement for Red Hat JBoss Data Grid 7.0.0, and includes bug fixes and enhancements, which are documented in the Release Notes linked to in the References. Security Fix: An infinite-loop vulnerability was discovered in Netty's OpenSslEngine handling of renegotiation. An attacker could exploit this flaw to cause a denial of service. Note: Netty is only vulnerable if renegotiation is enabled.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2016-05-24 CVE Reserved
  • 2017-04-13 CVE Published
  • 2024-08-06 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Netty
Search vendor "Netty"
Netty
Search vendor "Netty" for product "Netty"
>= 4.0.20 < 4.0.37
Search vendor "Netty" for product "Netty" and version " >= 4.0.20 < 4.0.37"
-
Affected
Netty
Search vendor "Netty"
Netty
Search vendor "Netty" for product "Netty"
>= 4.1.0 < 4.1.1
Search vendor "Netty" for product "Netty" and version " >= 4.1.0 < 4.1.1"
-
Affected
Redhat
Search vendor "Redhat"
Jboss Data Grid
Search vendor "Redhat" for product "Jboss Data Grid"
7.1
Search vendor "Redhat" for product "Jboss Data Grid" and version "7.1"
-
Affected
Redhat
Search vendor "Redhat"
Jboss Middleware Text-only Advisories
Search vendor "Redhat" for product "Jboss Middleware Text-only Advisories"
1.0
Search vendor "Redhat" for product "Jboss Middleware Text-only Advisories" and version "1.0"
middleware
Affected
Apache
Search vendor "Apache"
Cassandra
Search vendor "Apache" for product "Cassandra"
3.11.4
Search vendor "Apache" for product "Cassandra" and version "3.11.4"
-
Affected