CVE-2017-14495

Exp

Memory leak 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 (memory consumption) via vectors involving DNS response creation.

Published: 2017-10-03 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-14495 is rated High Exploit Risk (75/100): CVSS High severity, with high exploitation likelihood (EPSS 49.06%, 98th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2017-14495

EDB-ID Source Kind Published Link
42945 exploit_db edb 2017-10-02 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2017-14495

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-28 53.32% 49.06% -4.26%
2 2026-03-25 60.15% 53.32% -6.83%
3 2026-03-04 — 60.15% —

Full EPSS history (40 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-14495

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2017-14495

OS Trackers for CVE-2017-14495

vendor priority summary link
alpine — CVE-2017-14495: 1 source package rows (dnsmasq); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0. https://security.alpinelinux.org/vuln/CVE-2017-14495
debian not yet assigned CVE-2017-14495 not yet assigned priority: Debian including 1 source packages (dnsmasq), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-14495
gentoo normal CVE-2017-14495: 1 GLSA(s) (201710-27), 1 atom(s) (net-dns/dnsmasq); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-14495
redhat high — https://access.redhat.com/security/cve/CVE-2017-14495
suse high CVE-2017-14495 severity important: SUSE including 26 source package names (2.78:dnsmasq-2.78-18.3.1, dnsmasq, …), 54 product×package rows across 50 product lines (Container caasp/v4/dnsmasq-nanny, SUSE Liberty Linux 7, … (50 product lines)): Fixed 49, Known Not Affected 5. https://www.suse.com/security/cve/CVE-2017-14495/
ubuntu medium CVE-2017-14495 medium priority: Ubuntu including 1 source packages (dnsmasq), 4 status rows across 4 suites (trusty, upstream, xenial, zesty): released 3, needs-triage 1. https://ubuntu.com/security/CVE-2017-14495

Affected software / configurations for CVE-2017-14495

Vendor Product Version Raw CPE
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 17.04 cpe:2.3:o:canonical:ubuntu_linux:17.04:*:*:*:*:*:*:*
debian debian_linux 7.0 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
debian debian_linux 7.1 cpe:2.3:o:debian:debian_linux:7.1:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 7.0 cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_server 7.0 cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 7.0 cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
thekelleys dnsmasq <= 2.77 cpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*

References for CVE-2017-14495

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00006.html Issue Tracking Mailing List Third Party Advisory
http://nvidia.custhelp.com/app/answers/detail/a_id/4561
http://thekelleys.org.uk/dnsmasq/CHANGELOG Release Notes Vendor Advisory
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=51eadb692a5123b9838e5a68ecace3ac579a3a45
http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2017-005.txt
http://www.debian.org/security/2017/dsa-3989 Third Party Advisory
http://www.securityfocus.com/bid/101085 Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/101977
http://www.securitytracker.com/id/1039474 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-3430-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-3430-2 Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2836 Patch Third Party Advisory
https://access.redhat.com/security/vulnerabilities/3199382 Issue Tracking Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-689071.pdf
https://security.gentoo.org/glsa/201710-27
https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html Third Party Advisory
https://www.exploit-db.com/exploits/42945/ Third Party Advisory VDB Entry
https://www.kb.cert.org/vuls/id/973527 Third Party Advisory US Government Resource
https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11664.html
https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11665.html
https://www.synology.com/support/security/Synology_SA_17_59_Dnsmasq
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