CVE-2016-2774
Publication date 9 March 2016
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
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.
Status
Package | Ubuntu Release | Status |
---|---|---|
isc-dhcp | ||
20.04 LTS focal |
Not affected
|
|
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial |
Fixed 4.3.3-5ubuntu12.9
|
|
14.04 LTS trusty |
Fixed 4.2.4-7ubuntu12.12
|
|
Notes
mdeslaur
DoS over OMAPI and failover ports only, see ISC kb article for workarounds, or properly limit access to ports
Patch details
Package | Patch details |
---|---|
isc-dhcp |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.9 · Medium |
Attack vector | Network |
Attack complexity | High |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-3586-1
- DHCP vulnerabilities
- 1 March 2018