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Fencer Vulns
high 7.5

CVE-2017-14496 in the critical feed json

Integer underflow in the add_pseudoheader function in dnsmasq before 2.78 , when the --add-mac, --add-cpe-id or --add-subnet option is spec…

published 2017-10-02 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-5999

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
68.4%
EPSS 68.4% chance of exploitation in 30 days, percentile 99.3%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • dnsmasq Debian 14, Debian 13, Debian 12 2.78-1

debian advisories DEBIAN-CVE-2017-14496

  • dnsmasq Ubuntu 14.04 LTS 2.68-1ubuntu0.2
  • dnsmasq Ubuntu 16.04 LTS 2.75-1ubuntu0.16.04.3

ubuntu advisories UBUNTU-CVE-2017-14496

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • dnsmasq RHEL 7 2.76-2.el7_4.2
  • dnsmasq-utils RHEL 7 2.76-2.el7_4.2

red hat advisories RHSA-2017:2836

  • dnsmasq SLES 11 SP3-TERADATA, SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 2.78-0.16.5.1
  • dnsmasq SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES for SAP 12 SP1 +8 more 2.78-18.3.1
  • dnsmasq SLES for SAP 11 SP4, SLES 11 SP4 2.78-0.17.5.1
  • dnsmasq SLES 12-LTSS 2.78-6.6.1

suse advisories SUSE-SU-2017:2617-1SUSE-SU-2017:2616-1SUSE-SU-2017:2618-1SUSE-SU-2017:2619-1

  • dnsmasq openSUSE Tumbleweed 2.86-1.1

opensuse advisories openSUSE-SU-2024:10721-1

  • dnsmasq Alpine 3.24, Alpine 3.23, Alpine 3.22 +15 more 2.78-r0
  • dnsmasq Alpine 3.4, Alpine 3.3 2.76-r1
  • dnsmasq Alpine 3.5 2.76-r2
  • dnsmasq Alpine 3.6 2.76-r5

alpine advisories ALPINE-CVE-2017-14496

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • dnsmasq Arch Linux 2.78-1

arch linux advisories AVG-421

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-14496 updated cvss 7.5

dnsmasq: integer underflow leading to buffer over-read in the EDNS0 code

  • Red Hat Enterprise Linux Client (v. 7) dnsmasq 2.76-2.el7_4.2 Red Hat Enterprise Linux Client Optional (v. 7) dnsmasq-utils 2.76-2.el7_4.2 Red Hat Enterprise Linux ComputeNode (v. 7) dnsmasq 2.76-2.el7_4.2 Red Hat Enterprise Linux ComputeNode Optional (v. 7) dnsmasq-utils 2.76-2.el7_4.2 Red Hat Enterprise Linux Server (v. 7) dnsmasq 2.76-2.el7_4.2 Red Hat Enterprise Linux Server Optional (v. 7) dnsmasq-utils 2.76-2.el7_4.2
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) dnsmasq 2.76-2.el7_4.2 Red Hat Enterprise Linux Workstation Optional (v. 7) dnsmasq-utils 2.76-2.el7_4.2
    fixed: vendor fix RHSA-2017:2836
  • Red Hat Enterprise Linux 5 dnsmasq Red Hat Enterprise Linux 6 dnsmasq, dnsmasq-utils Red Hat Enterprise Linux OpenStack Platform 6 (Juno) dnsmasq Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) dnsmasq-utils Red Hat OpenStack Platform 8 (Liberty) dnsmasq-utils Red Hat OpenStack Platform 9 (Mitaka) dnsmasq-utils
    +3 more products
    Red Hat OpenStack Platform 10 (Newton) dnsmasq-utils Red Hat OpenStack Platform 11 (Ocata) dnsmasq Red Hat OpenStack Platform 12 (Pike) dnsmasq-utils
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-17-332-01 updated cvss 5.3

Siemens SCALANCE W1750D, M800, S615, and RUGGEDCOM RM1224 (Update C)

  • Siemens RUGGEDCOM RM1224 <V5.0 Siemens SCALANCE M-800 / S615 <V5.0
    affected: fixed in V5.0, mitigation
  • Siemens SCALANCE W1750D <V6.5.1.5
    affected: fixed in V6.5.1.5, mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Timeline

  1. First public exploit (EDB-42946)
  2. Published

Exploit prediction

68.42% chance of exploitation in the next 30 days, higher than 99.3% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-42946 Dnsmasq < 2.78 - Integer Underflow dos, 2017-10-02

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-191 Integer Underflow (Wrap or Wraparound)

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.