CVE-2016-2774
Scores
EPSS
Percentile: 65.6%
CVSS
CVSS Score: 5.9/10
All CVSS Scores
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
High (H)
Describes the conditions beyond the attacker's control
Privileges Required
None (N)
Describes the level of privileges an attacker must possess
User Interaction
None (N)
Captures the requirement for a human user participation
Scope
Unchanged (U)
Determines if a successful attack impacts components beyond the vulnerable component
Confidentiality Impact
None (N)
Measures the impact to the confidentiality of information
Integrity Impact
None (N)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
High (H)
Measures the impact to the availability of the impacted component
Vector: AV:N/AC:H/Au:N/C:N/I:N/A:P
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
High (H)
Describes the conditions beyond the attacker's control
Authentication
None (N)
Describes the level of privileges an attacker must possess
Confidentiality Impact
None (N)
Measures the impact to the confidentiality of information
Integrity Impact
None (N)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
Partial
Measures the impact to the availability of the impacted component
Description
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.
Scaner-VS 7 — a modern vulnerability management solution
Sources
CWEs
Recommendations
Source: nvd
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
Vulnerable Software (19)
Type: Configuration
Product: dhcp
Operating System: rhel 7
{ "fixed": "4.2.5-47.el7"}
Source: redhat
Type: Configuration
Product: isc-dhcp
Operating System: debian
{ "fixed": "4.3.4-1"}
Source: debian
Type: Configuration
Product: isc-dhcp
Operating System: debian wheezy 7
{ "unfixed": true}
Source: debian
Type: Configuration
Product: isc-dhcp
Operating System: ubuntu artful 17.10
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: isc-dhcp
Operating System: ubuntu bionic 18.04
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: isc-dhcp
Operating System: ubuntu cosmic 18.10
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: isc-dhcp
Operating System: ubuntu disco 19.04
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: isc-dhcp
Operating System: ubuntu eoan 19.10
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: isc-dhcp
Operating System: ubuntu focal 20.04
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: isc-dhcp
Operating System: ubuntu groovy 20.10
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: isc-dhcp
Operating System: ubuntu hirsute 21.04
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: isc-dhcp
Operating System: ubuntu trusty 14.04
{ "fixed": "4.2.4-7ubuntu12.12"}
Source: ubuntu
Type: Configuration
Product: isc-dhcp
Operating System: ubuntu wily 15.10
{ "unfixed": true}
Source: ubuntu
Type: Configuration
Product: isc-dhcp
Operating System: ubuntu xenial 16.04
{ "fixed": "4.3.3-5ubuntu12.9"}
Source: ubuntu
Type: Configuration
Product: isc-dhcp
Operating System: ubuntu yakkety 16.10
{ "unfixed": true}
Source: ubuntu
Type: Configuration
Product: isc-dhcp
Operating System: ubuntu zesty 17.04
{ "unfixed": true}
Source: ubuntu
Type: Configuration
Vendor: *
Product: debian_linux
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true } ], "operator": "OR"}
Source: nvd
Type: Configuration
Vendor: *
Product: dhcp
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:*", "vulne...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r10:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r10_b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r11_b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc2:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r12:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r12_b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r2:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r3:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r3_b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r4:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r5:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r5_b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r5_rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r5_rc2:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r6:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r7:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r8:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r8_b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r8_rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r9:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r9_b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:r9_rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1-esv:rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1.0:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1.0:a1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1.0:a2:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1.0:b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1.1:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1.1:b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1.1:b2:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1.1:b3:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1.1:p1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1.1:rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1.2:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1.2:b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1.2:p1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.1.2:rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.0:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.0:a1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.0:a2:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.0:b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.0:b2:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.0:p1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.0:p2:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.0:rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.1:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.1:b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.1:p1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.1:rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.2:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.2:b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.2:rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.3:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.3:p1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.3:p2:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.4:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.4:b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.4:p1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.4:p2:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.4:rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.4:rc2:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.5:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.5:b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.5:p1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.5:rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.6:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.6:b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.6:rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.7:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.7:b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.7:rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.8:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.8:b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.8:rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.2.8:rc2:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.3.0:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.3.0:a1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.3.0:b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.3.0:rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.3.1:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.3.1:b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.3.1:rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.3.2:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.3.2:b1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.3.2:rc1:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.3.2:rc2:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.3.3:-:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:isc:dhcp:4.3.3:b1:*:*:*:*:*:*", "vulnerable": true } ], "operator": "OR"}
Source: nvd
Type: Configuration
Vendor: *
Product: ubuntu_linux
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*", "vulnerable": true } ], "operator": "OR"}
Source: nvd