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Fencer Intel
critical 9.8

CVE-2017-14491 in the critical feed json

Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a denial of service (crash) or execute arbitrary code vi…

published 9y ago modified 4mo ago also EUVD-2017-5994

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
86.5%
EPSS 86.5% chance of exploitation in 30 days, percentile 99.7%
public exploits
1
Exploit-DB

Summary

Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response.

Patch / fix

  • nvidia geforce_experience 3.10.0.55
  • nvidia linux_for_tegra r21.6, r24.2.2
  • huawei honor_v9_play_firmware jimmy-al00ac00b135
  • arista eos 4.16.13m, 4.17.8m
  • siemens ruggedcom_rm1224_firmware 5.0
  • siemens scalance_m-800_firmware 5.0
  • siemens scalance_s615_firmware 5.0
  • siemens scalance_w1750d_firmware 6.5.1.5
  • arubanetworks arubaos 6.3.1.25, 6.4.4.16, 6.5.1.9, 6.5.3.3, 6.5.4.2, 8.1.0.4
  • dnsmasq Debian 14, Debian 13, Debian 12 2.78-1

debian advisories DEBIAN-CVE-2017-14491

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

ubuntu advisories UBUNTU-CVE-2017-14491

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
  • dnsmasq RHEL 6 2.48-18.el6_9
  • dnsmasq-utils RHEL 6 2.48-18.el6_9
  • dnsmasq RHEL 7.2 EUS 2.66-14.el7_2.2
  • dnsmasq RHEL 7.3 EUS 2.66-21.el7_3.2
  • dnsmasq-utils RHEL 7.2 EUS 2.66-14.el7_2.2
  • dnsmasq-utils RHEL 7.3 EUS 2.66-21.el7_3.2

red hat advisories RHSA-2017:2837RHSA-2017:2836RHSA-2017:2841RHSA-2017:2840RHSA-2017:2839RHSA-2017:2838

  • 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-2017-14491

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

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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-2017-14491 updated cvss 9.8

dnsmasq: heap overflow in the code responsible for building DNS replies

  • Red Hat Enterprise Linux Client (v. 7) dnsmasq 2.76-2.el7_4.2, dnsmasq-utils 2.76-2.el7_4.2 Red Hat Enterprise Linux Client Optional (v. 7) dnsmasq 2.76-2.el7_4.2, dnsmasq-utils 2.76-2.el7_4.2 Red Hat Enterprise Linux ComputeNode (v. 7) dnsmasq 2.76-2.el7_4.2, dnsmasq-utils 2.76-2.el7_4.2
    fixed: vendor fix RHSA-2017:2836
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.2) dnsmasq 2.66-14.el7_2.2, dnsmasq-utils 2.66-14.el7_2.2 Red Hat Enterprise Linux ComputeNode EUS (v. 7.3) dnsmasq 2.66-21.el7_3.2, dnsmasq-utils 2.66-21.el7_3.2
    fixed: vendor fix RHSA-2017:2837
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) dnsmasq 2.76-2.el7_4.2, dnsmasq-utils 2.76-2.el7_4.2
    fixed: vendor fix RHSA-2017:2836
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.2) dnsmasq 2.66-14.el7_2.2, dnsmasq-utils 2.66-14.el7_2.2 Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3) dnsmasq 2.66-21.el7_3.2, dnsmasq-utils 2.66-21.el7_3.2
    fixed: vendor fix RHSA-2017:2837
  • Red Hat Enterprise Linux Desktop (v. 6) dnsmasq 2.48-18.el6_9, dnsmasq-utils 2.48-18.el6_9 Red Hat Enterprise Linux Desktop Optional (v. 6) dnsmasq 2.48-18.el6_9, dnsmasq-utils 2.48-18.el6_9 Red Hat Enterprise Linux HPC Node (v. 6) dnsmasq 2.48-18.el6_9, dnsmasq-utils 2.48-18.el6_9
    fixed: vendor fix RHSA-2017:2838
  • Red Hat Enterprise Linux HPC Node EUS (v. 6.7) dnsmasq 2.48-16.el6_7.1, dnsmasq-utils 2.48-16.el6_7.1
    fixed: vendor fix RHSA-2017:2839
  • Red Hat Enterprise Linux HPC Node Optional (v. 6) dnsmasq 2.48-18.el6_9, dnsmasq-utils 2.48-18.el6_9
    fixed: vendor fix RHSA-2017:2838
  • Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) dnsmasq 2.48-16.el6_7.1, dnsmasq-utils 2.48-16.el6_7.1
    fixed: vendor fix RHSA-2017:2839
show 14 more
  • Red Hat Enterprise Linux Long Life (v. 5.9 server) dnsmasq 2.45-2.el5_9.1
    fixed: vendor fix RHSA-2017:2841
  • Red Hat Enterprise Linux Server (v. 5 ELS) dnsmasq 2.45-2.el5_11.1
    fixed: vendor fix RHSA-2017:2840
  • Red Hat Enterprise Linux Server (v. 6) dnsmasq 2.48-18.el6_9, dnsmasq-utils 2.48-18.el6_9
    fixed: vendor fix RHSA-2017:2838
  • Red Hat Enterprise Linux Server (v. 7) dnsmasq 2.76-2.el7_4.2, dnsmasq-utils 2.76-2.el7_4.2
    fixed: vendor fix RHSA-2017:2836
  • Red Hat Enterprise Linux Server AUS (v. 6.2) dnsmasq 2.48-5.el6_2.2 Red Hat Enterprise Linux Server AUS (v. 6.4) dnsmasq 2.48-13.el6_4.1, dnsmasq-utils 2.48-13.el6_4.1 Red Hat Enterprise Linux Server AUS (v. 6.5) dnsmasq 2.48-13.el6_5.1, dnsmasq-utils 2.48-13.el6_5.1 Red Hat Enterprise Linux Server AUS (v. 6.6) dnsmasq 2.48-14.el6_6.1, dnsmasq-utils 2.48-14.el6_6.1 Red Hat Enterprise Linux Server EUS (v. 6.7) dnsmasq 2.48-16.el6_7.1, dnsmasq-utils 2.48-16.el6_7.1
    fixed: vendor fix RHSA-2017:2839
  • Red Hat Enterprise Linux Server EUS (v. 7.2) dnsmasq 2.66-14.el7_2.2, dnsmasq-utils 2.66-14.el7_2.2 Red Hat Enterprise Linux Server EUS (v. 7.3) dnsmasq 2.66-21.el7_3.2, dnsmasq-utils 2.66-21.el7_3.2
    fixed: vendor fix RHSA-2017:2837
  • Red Hat Enterprise Linux Server Optional (v. 6) dnsmasq 2.48-18.el6_9, dnsmasq-utils 2.48-18.el6_9
    fixed: vendor fix RHSA-2017:2838
  • Red Hat Enterprise Linux Server Optional (v. 7) dnsmasq 2.76-2.el7_4.2, dnsmasq-utils 2.76-2.el7_4.2
    fixed: vendor fix RHSA-2017:2836
  • Red Hat Enterprise Linux Server Optional AUS (v. 6.4) dnsmasq 2.48-13.el6_4.1, dnsmasq-utils 2.48-13.el6_4.1 Red Hat Enterprise Linux Server Optional AUS (v. 6.5) dnsmasq 2.48-13.el6_5.1, dnsmasq-utils 2.48-13.el6_5.1 Red Hat Enterprise Linux Server Optional AUS (v. 6.6) dnsmasq 2.48-14.el6_6.1, dnsmasq-utils 2.48-14.el6_6.1 Red Hat Enterprise Linux Server Optional EUS (v. 6.7) dnsmasq 2.48-16.el6_7.1, dnsmasq-utils 2.48-16.el6_7.1
    fixed: vendor fix RHSA-2017:2839
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.2) dnsmasq 2.66-14.el7_2.2, dnsmasq-utils 2.66-14.el7_2.2 Red Hat Enterprise Linux Server Optional EUS (v. 7.3) dnsmasq 2.66-21.el7_3.2, dnsmasq-utils 2.66-21.el7_3.2
    fixed: vendor fix RHSA-2017:2837
  • Red Hat Enterprise Linux Server Optional TUS (v. 6.5) dnsmasq 2.48-13.el6_5.1, dnsmasq-utils 2.48-13.el6_5.1 Red Hat Enterprise Linux Server Optional TUS (v. 6.6) dnsmasq 2.48-14.el6_6.1, dnsmasq-utils 2.48-14.el6_6.1 Red Hat Enterprise Linux Server TUS (v. 6.5) dnsmasq 2.48-13.el6_5.1, dnsmasq-utils 2.48-13.el6_5.1 Red Hat Enterprise Linux Server TUS (v. 6.6) dnsmasq 2.48-14.el6_6.1, dnsmasq-utils 2.48-14.el6_6.1
    fixed: vendor fix RHSA-2017:2839
  • Red Hat Enterprise Linux Workstation (v. 6) dnsmasq 2.48-18.el6_9, dnsmasq-utils 2.48-18.el6_9
    fixed: vendor fix RHSA-2017:2838
  • Red Hat Enterprise Linux Workstation (v. 7) dnsmasq 2.76-2.el7_4.2, dnsmasq-utils 2.76-2.el7_4.2
    fixed: vendor fix RHSA-2017:2836
  • Red Hat Enterprise Linux Workstation Optional (v. 6) dnsmasq 2.48-18.el6_9, dnsmasq-utils 2.48-18.el6_9
    fixed: vendor fix RHSA-2017:2838

1 more fixed, 7 more not affected in the full advisory

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-24-074-07 updated cvss 8.1

Siemens SIMATIC

  • Siemens SIMATIC RF160B (6GT2003-0FA00) <V2.2
    affected: mitigation “Siemens has released a new version (V2.2) for SIMATIC RF160B and recommends to update to the latest version.” siemens.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

cisa ICSA-17-332-01 updated cvss 8.1

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-42941)
  2. Published

Exploit prediction

86.49% chance of exploitation in the next 30 days, higher than 99.7% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-42941 Dnsmasq < 2.78 - 2-byte Heap Overflow dos, 2017-10-02
  • packetstormsecurity.com http://packetstormsecurity.com/files/144480/Dnsmasq-2-Byte-Heap-Based-Overflow.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Intel 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.