// For flags

CVE-2016-1882

FreeBSD Security Advisory - FreeBSD-SA-16:05.tcp

Severity Score

7.5
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

FreeBSD 9.3 before p33, 10.1 before p26, and 10.2 before p9 allow remote attackers to cause a denial of service (kernel crash) via vectors related to creating a TCP connection with the TCP_MD5SIG and TCP_NOOPT socket options.

FreeBSD 9.3 en versiones anteriores a p33, 10.1 en versiones anteriores a p26 y 10.2 en versiones anteriores a p9 permiten a atacantes remotos causar una denegación de servicio (caída de kernel) a través de vectores relacionados con la creación de una conexión TCP con las opciones socket TCP_MD5SIG y TCP_NOOPT.

A programming error in processing a TCP connection with both TCP_MD5SIG and TCP_NOOPT socket options may lead to kernel crash. A local attacker can crash the kernel, resulting in a denial-of-service. A remote attack is theoretically possible, if server has a listening socket with TCP_NOOPT set, and server is either out of SYN cache entries, or SYN cache is disabled by configuration.

*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
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2016-01-13 CVE Reserved
  • 2016-01-15 CVE Published
  • 2024-08-05 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-19: Data Processing Errors
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Freebsd
Search vendor "Freebsd"
 Freebsd
Search vendor "Freebsd" for product "Freebsd"
 9.3
Search vendor "Freebsd" for product "Freebsd" and version "9.3"
-
Affected
Freebsd
Search vendor "Freebsd"
 Freebsd
Search vendor "Freebsd" for product "Freebsd"
 10.1
Search vendor "Freebsd" for product "Freebsd" and version "10.1"
-
Affected
Freebsd
Search vendor "Freebsd"
 Freebsd
Search vendor "Freebsd" for product "Freebsd"
 10.2
Search vendor "Freebsd" for product "Freebsd" and version "10.2"
-
Affected