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Fencer Intel
high 7.5

CVE-2019-14513 json

Improper bounds checking in Dnsmasq before 2.76 allows an attacker controlled DNS server to send large DNS packets that result in a read op…

published 7y ago modified 4mo ago also EUVD-2019-5688

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

Improper bounds checking in Dnsmasq before 2.76 allows an attacker controlled DNS server to send large DNS packets that result in a read operation beyond the buffer allocated for the packet, a different vulnerability than CVE-2017-14491.

Patch / fix

  • thekelleys dnsmasq 2.76
  • dnsmasq Debian 14, Debian 13, Debian 12 2.76-1

debian advisories DEBIAN-CVE-2019-14513

  • dnsmasq Ubuntu 16.04 LTS 2.75-1ubuntu0.16.04.10

ubuntu advisories UBUNTU-CVE-2019-14513

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
  • dnsmasq-utils RHEL 7 2.76-2.el7

red hat advisories RHBA-2017:2117

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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-2019-14513 updated cvss 5.3

dnsmasq: Improper bounds checking leads to a buffer overread

  • Red Hat Enterprise Linux Client (v. 7) dnsmasq 2.76-2.el7 Red Hat Enterprise Linux Client Optional (v. 7) dnsmasq-utils 2.76-2.el7 Red Hat Enterprise Linux ComputeNode (v. 7) dnsmasq 2.76-2.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) dnsmasq-utils 2.76-2.el7 Red Hat Enterprise Linux Server (v. 7) dnsmasq 2.76-2.el7 Red Hat Enterprise Linux Server Optional (v. 7) dnsmasq-utils 2.76-2.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) dnsmasq 2.76-2.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) dnsmasq-utils 2.76-2.el7
    fixed: vendor fix RHBA-2017:2117
  • Red Hat Enterprise Linux 5 dnsmasq Red Hat Enterprise Linux 6 dnsmasq, dnsmasq-utils Red Hat Enterprise Linux 8 dnsmasq, dnsmasq-utils Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) dnsmasq-utils Red Hat OpenStack Platform 9 (Mitaka) dnsmasq-utils Red Hat OpenStack Platform 10 (Newton) dnsmasq-utils
    +2 more products
    Red Hat OpenStack Platform 13 (Queens) dnsmasq-utils Red Hat OpenStack Platform 14 (Rocky) 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

Exploit prediction

1.71% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/Slovejoy/dnsmasq-pre2.76 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/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.