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Vulnerability Details :

CVE-2020-37127

Summary
Assigner-VulnCheck
Assigner Org ID-83251b91-4cc7-4094-a5c7-464a1b83ea10
Published At-05 Feb, 2026 | 16:13
Updated At-05 Feb, 2026 | 21:18
Rejected At-
Credits

dnsmasq-utils 2.79-1 - 'dhcp_release' Denial of Service

Dnsmasq-utils 2.79-1 contains a buffer overflow vulnerability in the dhcp_release utility that allows attackers to cause a denial of service by supplying excessive input. Attackers can trigger a core dump and terminate the dhcp_release process by sending a crafted input string longer than 16 characters.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:VulnCheck
Assigner Org ID:83251b91-4cc7-4094-a5c7-464a1b83ea10
Published At:05 Feb, 2026 | 16:13
Updated At:05 Feb, 2026 | 21:18
Rejected At:
â–¼CVE Numbering Authority (CNA)
dnsmasq-utils 2.79-1 - 'dhcp_release' Denial of Service

Dnsmasq-utils 2.79-1 contains a buffer overflow vulnerability in the dhcp_release utility that allows attackers to cause a denial of service by supplying excessive input. Attackers can trigger a core dump and terminate the dhcp_release process by sending a crafted input string longer than 16 characters.

Affected Products
Vendor
dnsmasq
Product
dnsmasq-utils
Default Status
unaffected
Versions
Affected
  • 2.79
Problem Types
TypeCWE IDDescription
CWECWE-121Stack-based Buffer Overflow
Type: CWE
CWE ID: CWE-121
Description: Stack-based Buffer Overflow
Metrics
VersionBase scoreBase severityVector
4.06.9MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
3.15.5MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Version: 3.1
Base score: 5.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

finder
Josue Encinar
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://www.exploit-db.com/exploits/48301
exploit
https://launchpad.net/ubuntu/+source/dnsmasq/2.79-1
product
https://www.vulncheck.com/advisories/dnsmasq-utils-dhcprelease-denial-of-service
third-party-advisory
Hyperlink: https://www.exploit-db.com/exploits/48301
Resource:
exploit
Hyperlink: https://launchpad.net/ubuntu/+source/dnsmasq/2.79-1
Resource:
product
Hyperlink: https://www.vulncheck.com/advisories/dnsmasq-utils-dhcprelease-denial-of-service
Resource:
third-party-advisory
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:disclosure@vulncheck.com
Published At:05 Feb, 2026 | 17:16
Updated At:05 Feb, 2026 | 20:47

Dnsmasq-utils 2.79-1 contains a buffer overflow vulnerability in the dhcp_release utility that allows attackers to cause a denial of service by supplying excessive input. Attackers can trigger a core dump and terminate the dhcp_release process by sending a crafted input string longer than 16 characters.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.06.9MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary3.15.5MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Type: Secondary
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Primary
Version: 3.1
Base score: 5.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-121Secondarydisclosure@vulncheck.com
CWE ID: CWE-121
Type: Secondary
Source: disclosure@vulncheck.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://launchpad.net/ubuntu/+source/dnsmasq/2.79-1disclosure@vulncheck.com
N/A
https://www.exploit-db.com/exploits/48301disclosure@vulncheck.com
N/A
https://www.vulncheck.com/advisories/dnsmasq-utils-dhcprelease-denial-of-servicedisclosure@vulncheck.com
N/A
Hyperlink: https://launchpad.net/ubuntu/+source/dnsmasq/2.79-1
Source: disclosure@vulncheck.com
Resource: N/A
Hyperlink: https://www.exploit-db.com/exploits/48301
Source: disclosure@vulncheck.com
Resource: N/A
Hyperlink: https://www.vulncheck.com/advisories/dnsmasq-utils-dhcprelease-denial-of-service
Source: disclosure@vulncheck.com
Resource: N/A

Change History

0
Information is not available yet

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Details not found