CVE-2016-2774
dhcp: unclosed TCP connections to OMAPI or failover ports can cause DoS
Severity Score
5.9
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
ISC DHCP 4.1.x before 4.1-ESV-R13 and 4.2.x and 4.3.x before 4.3.4 does not restrict the number of concurrent TCP sessions, which allows remote attackers to cause a denial of service (INSIST assertion failure or request-processing outage) by establishing many sessions.
ISC DHCP 4.1.x en versiones anteriores a 4.1-ESV-R13 y 4.2.x y 4.3.x en versiones anteriores a 4.3.4 no restringe el número de sesiones TCP concurrentes, lo que permite a atacantes remotos provocar una denegación de servicio (fallo de aserción INSIST o interrupción de procesamiento de petición) estableciendo muchas sesiones.
A resource-consumption flaw was discovered in the DHCP server. dhcpd did not restrict the number of open connections to OMAPI and failover ports. A remote attacker able to establish TCP connections to one of these ports could use this flaw to cause dhcpd to exit unexpectedly, stop responding requests, or exhaust system sockets (denial of service).
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2016-02-26 CVE Reserved
- 2016-03-09 CVE Published
- 2023-03-07 EPSS Updated
- 2024-08-05 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-20: Improper Input Validation
- CWE-400: Uncontrolled Resource Consumption
CAPEC
References (12)
| URL | Tag | Source |
|---|---|---|
| http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html | Third Party Advisory |
|
| http://www.securityfocus.com/bid/84208 | Third Party Advisory | |
| http://www.securitytracker.com/id/1035196 | Third Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2019/11/msg00023.html | Mailing List |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r10 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r10_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r11_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r11_rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r11_rc2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r12 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r12_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r3 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r3_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r4 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r5 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r5_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r5_rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r5_rc2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r6 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r7 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r8 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r8_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r8_rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r9 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r9_b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | r9_rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.0 Search vendor "Isc" for product "Dhcp" and version "4.1.0" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.0 Search vendor "Isc" for product "Dhcp" and version "4.1.0" | a1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.0 Search vendor "Isc" for product "Dhcp" and version "4.1.0" | a2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.0 Search vendor "Isc" for product "Dhcp" and version "4.1.0" | b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.1 Search vendor "Isc" for product "Dhcp" and version "4.1.1" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.1 Search vendor "Isc" for product "Dhcp" and version "4.1.1" | b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.1 Search vendor "Isc" for product "Dhcp" and version "4.1.1" | b2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.1 Search vendor "Isc" for product "Dhcp" and version "4.1.1" | b3 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.1 Search vendor "Isc" for product "Dhcp" and version "4.1.1" | p1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.1 Search vendor "Isc" for product "Dhcp" and version "4.1.1" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.2 Search vendor "Isc" for product "Dhcp" and version "4.1.2" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.2 Search vendor "Isc" for product "Dhcp" and version "4.1.2" | b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.2 Search vendor "Isc" for product "Dhcp" and version "4.1.2" | p1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.1.2 Search vendor "Isc" for product "Dhcp" and version "4.1.2" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0" | a1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0" | a2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0" | b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0" | b2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0" | p1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0" | p2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.1 Search vendor "Isc" for product "Dhcp" and version "4.2.1" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.1 Search vendor "Isc" for product "Dhcp" and version "4.2.1" | b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.1 Search vendor "Isc" for product "Dhcp" and version "4.2.1" | p1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.1 Search vendor "Isc" for product "Dhcp" and version "4.2.1" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.2 Search vendor "Isc" for product "Dhcp" and version "4.2.2" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.2 Search vendor "Isc" for product "Dhcp" and version "4.2.2" | b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.2 Search vendor "Isc" for product "Dhcp" and version "4.2.2" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.3 Search vendor "Isc" for product "Dhcp" and version "4.2.3" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.3 Search vendor "Isc" for product "Dhcp" and version "4.2.3" | p1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.3 Search vendor "Isc" for product "Dhcp" and version "4.2.3" | p2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.4 Search vendor "Isc" for product "Dhcp" and version "4.2.4" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.4 Search vendor "Isc" for product "Dhcp" and version "4.2.4" | b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.4 Search vendor "Isc" for product "Dhcp" and version "4.2.4" | p1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.4 Search vendor "Isc" for product "Dhcp" and version "4.2.4" | p2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.4 Search vendor "Isc" for product "Dhcp" and version "4.2.4" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.4 Search vendor "Isc" for product "Dhcp" and version "4.2.4" | rc2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.5 Search vendor "Isc" for product "Dhcp" and version "4.2.5" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.5 Search vendor "Isc" for product "Dhcp" and version "4.2.5" | b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.5 Search vendor "Isc" for product "Dhcp" and version "4.2.5" | p1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.5 Search vendor "Isc" for product "Dhcp" and version "4.2.5" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.6 Search vendor "Isc" for product "Dhcp" and version "4.2.6" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.6 Search vendor "Isc" for product "Dhcp" and version "4.2.6" | b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.6 Search vendor "Isc" for product "Dhcp" and version "4.2.6" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.7 Search vendor "Isc" for product "Dhcp" and version "4.2.7" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.7 Search vendor "Isc" for product "Dhcp" and version "4.2.7" | b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.7 Search vendor "Isc" for product "Dhcp" and version "4.2.7" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.8 Search vendor "Isc" for product "Dhcp" and version "4.2.8" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.8 Search vendor "Isc" for product "Dhcp" and version "4.2.8" | b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.8 Search vendor "Isc" for product "Dhcp" and version "4.2.8" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.2.8 Search vendor "Isc" for product "Dhcp" and version "4.2.8" | rc2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.3.0 Search vendor "Isc" for product "Dhcp" and version "4.3.0" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.3.0 Search vendor "Isc" for product "Dhcp" and version "4.3.0" | a1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.3.0 Search vendor "Isc" for product "Dhcp" and version "4.3.0" | b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.3.0 Search vendor "Isc" for product "Dhcp" and version "4.3.0" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.3.1 Search vendor "Isc" for product "Dhcp" and version "4.3.1" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.3.1 Search vendor "Isc" for product "Dhcp" and version "4.3.1" | b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.3.1 Search vendor "Isc" for product "Dhcp" and version "4.3.1" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.3.2 Search vendor "Isc" for product "Dhcp" and version "4.3.2" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.3.2 Search vendor "Isc" for product "Dhcp" and version "4.3.2" | b1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.3.2 Search vendor "Isc" for product "Dhcp" and version "4.3.2" | rc1 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.3.2 Search vendor "Isc" for product "Dhcp" and version "4.3.2" | rc2 |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.3.3 Search vendor "Isc" for product "Dhcp" and version "4.3.3" | - |
Affected
| ||||||
| Isc Search vendor "Isc" | Dhcp Search vendor "Isc" for product "Dhcp" | 4.3.3 Search vendor "Isc" for product "Dhcp" and version "4.3.3" | b1 |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0" | - |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04" | lts |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04" | lts |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 17.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "17.10" | - |
Affected
| ||||||