Vulnerability Monitor

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CVE-2017-14496

Integer underflow in the add_pseudoheader function in dnsmasq before 2.78 , when the --add-mac, --add-cpe-id or --add-subnet option is specified, allows remote attackers to cause a denial of service via a crafted DNS request.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 8 products from canonical, from debian, from google and 5 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2017-10-03T01:29:02.200

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

10.0

Impact Score

6.9

Weaknesses

Type: Primary
CWE-191

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	canonical	ubuntu_linux	14.04	Yes
Operating System	canonical	ubuntu_linux	16.04	Yes
Operating System	canonical	ubuntu_linux	17.04	Yes
Operating System	debian	debian_linux	7.0	Yes
Operating System	debian	debian_linux	7.1	Yes
Operating System	debian	debian_linux	9.0	Yes
Operating System	google	android	4.4.4	Yes
Operating System	google	android	5.0.2	Yes
Operating System	google	android	5.1.1	Yes
Operating System	google	android	6.0	Yes
Operating System	google	android	6.0.1	Yes
Operating System	google	android	7.0	Yes
Operating System	google	android	7.1.1	Yes
Operating System	google	android	7.1.2	Yes
Operating System	google	android	8.0	Yes
Operating System	novell	leap	42.2	Yes
Operating System	novell	leap	42.3	Yes
Operating System	redhat	enterprise_linux_desktop	7.0	Yes
Operating System	redhat	enterprise_linux_server	7.0	Yes
Operating System	redhat	enterprise_linux_workstation	7.0	Yes
Application	thekelleys	dnsmasq	≤ 2.77	Yes

References

http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00006.html Issue Tracking, Mailing List, Third Party Advisory ([email protected])
http://nvidia.custhelp.com/app/answers/detail/a_id/4561 ([email protected])
http://thekelleys.org.uk/dnsmasq/CHANGELOG Release Notes, Vendor Advisory ([email protected])
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=897c113fda0886a28a986cc6ba17bb93bd6cb1c7 ([email protected])
http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2017-005.txt ([email protected])
http://www.debian.org/security/2017/dsa-3989 Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/101085 Third Party Advisory, VDB Entry ([email protected])
http://www.securityfocus.com/bid/101977 ([email protected])
http://www.securitytracker.com/id/1039474 Third Party Advisory, VDB Entry ([email protected])
http://www.ubuntu.com/usn/USN-3430-1 Third Party Advisory ([email protected])
http://www.ubuntu.com/usn/USN-3430-2 Third Party Advisory ([email protected])
https://access.redhat.com/errata/RHSA-2017:2836 Patch, Third Party Advisory ([email protected])
https://access.redhat.com/security/vulnerabilities/3199382 Issue Tracking, Third Party Advisory ([email protected])
https://cert-portal.siemens.com/productcert/pdf/ssa-689071.pdf ([email protected])
https://security.gentoo.org/glsa/201710-27 ([email protected])
https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html Third Party Advisory ([email protected])
https://source.android.com/security/bulletin/2017-10-01 Third Party Advisory ([email protected])
https://www.exploit-db.com/exploits/42946/ Third Party Advisory, VDB Entry ([email protected])
https://www.kb.cert.org/vuls/id/973527 Third Party Advisory, US Government Resource ([email protected])
https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11664.html ([email protected])
https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11665.html ([email protected])
https://www.synology.com/support/security/Synology_SA_17_59_Dnsmasq ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00006.html Issue Tracking, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://nvidia.custhelp.com/app/answers/detail/a_id/4561 (af854a3a-2127-422b-91ae-364da2661108)
http://thekelleys.org.uk/dnsmasq/CHANGELOG Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=897c113fda0886a28a986cc6ba17bb93bd6cb1c7 (af854a3a-2127-422b-91ae-364da2661108)
http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2017-005.txt (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2017/dsa-3989 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/101085 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/101977 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1039474 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-3430-1 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-3430-2 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2017:2836 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/security/vulnerabilities/3199382 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://cert-portal.siemens.com/productcert/pdf/ssa-689071.pdf (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201710-27 (af854a3a-2127-422b-91ae-364da2661108)
https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://source.android.com/security/bulletin/2017-10-01 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.exploit-db.com/exploits/42946/ Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://www.kb.cert.org/vuls/id/973527 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11664.html (af854a3a-2127-422b-91ae-364da2661108)
https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11665.html (af854a3a-2127-422b-91ae-364da2661108)
https://www.synology.com/support/security/Synology_SA_17_59_Dnsmasq (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For canonical's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.