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Vulnerabilities / CVE-2017-14491

critical

CVE-2017-14491

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

Published Modified CWE 787
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD, Red Hat, Amazon, Oracle, Photon OS. Rated lower by Ubuntu (high).

Description

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.

Affected packages and fixed versions

SourcePackageFixed in
amazon linux 1dnsmasq, dnsmasq-debuginfo, dnsmasq-utils2.76-2.14.amzn1
amazon linux 2dnsmasq, dnsmasq-debuginfo, dnsmasq-utils2.76-5.amzn2
Oracle Linux 5dnsmasq2.45-1.1.0.1.el5_11
Oracle Linux 6dnsmasq, dnsmasq-utils2.48-18.el6_9
Oracle Linux 7dnsmasq, dnsmasq-utils2.76-2.el7_4.2
Photon OS 1.0dnsmasq2.76-2.ph1
Photon OS 2.0dnsmasq2.76-3.ph2
alpine 3.10dnsmasq2.78-r0
alpine 3.11dnsmasq2.78-r0
alpine 3.12dnsmasq2.78-r0
alpine 3.13dnsmasq2.78-r0
alpine 3.14dnsmasq2.78-r0
Show all 49 entries from 43 sources
SourcePackageFixed in
amazon linux 1dnsmasq2.76-2.14.amzn1
amazon linux 1dnsmasq-debuginfo2.76-2.14.amzn1
amazon linux 1dnsmasq-utils2.76-2.14.amzn1
amazon linux 2dnsmasq2.76-5.amzn2
amazon linux 2dnsmasq-debuginfo2.76-5.amzn2
amazon linux 2dnsmasq-utils2.76-5.amzn2
Oracle Linux 5dnsmasq2.45-1.1.0.1.el5_11
Oracle Linux 6dnsmasq2.48-18.el6_9
Oracle Linux 6dnsmasq-utils2.48-18.el6_9
Oracle Linux 7dnsmasq2.76-2.el7_4.2
Oracle Linux 7dnsmasq-utils2.76-2.el7_4.2
Photon OS 1.0dnsmasq2.76-2.ph1
Photon OS 2.0dnsmasq2.76-3.ph2
alpine 3.10dnsmasq2.78-r0
alpine 3.11dnsmasq2.78-r0
alpine 3.12dnsmasq2.78-r0
alpine 3.13dnsmasq2.78-r0
alpine 3.14dnsmasq2.78-r0
alpine 3.15dnsmasq2.78-r0
alpine 3.16dnsmasq2.78-r0
alpine 3.17dnsmasq2.78-r0
alpine 3.18dnsmasq2.78-r0
alpine 3.19dnsmasq2.78-r0
alpine 3.20dnsmasq2.78-r0
alpine 3.21dnsmasq2.78-r0
alpine 3.22dnsmasq2.78-r0
alpine 3.23dnsmasq2.78-r0
alpine 3.24dnsmasq2.78-r0
alpine 3.3dnsmasq2.76-r1
alpine 3.4dnsmasq2.76-r1
alpine 3.5dnsmasq2.76-r2
alpine 3.6dnsmasq2.76-r5
alpine 3.7dnsmasq2.78-r0
alpine 3.8dnsmasq2.78-r0
alpine 3.9dnsmasq2.78-r0
alpine edgednsmasq2.78-r0
debian 11dnsmasq2.78-1
debian 12dnsmasq2.78-1
debian 13dnsmasq2.78-1
debian 14dnsmasq2.78-1
debian 7dnsmasq2.62-3+deb7u4
debian 8dnsmasq2.72-3+deb8u2
debian 9dnsmasq2.76-5+deb9u1
echodnsmasq2.78-1
ubuntu 14.04dnsmasq2.68-1ubuntu0.2
ubuntu 14.04-ESMdnsmasq2.68-1ubuntu0.2
ubuntu 16.04dnsmasq2.75-1ubuntu0.16.04.3
ubuntu 16.04-ESMdnsmasq2.75-1ubuntu0.16.04.3
ubuntu 17.04dnsmasq2.76-5ubuntu0.1

References

All 47 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.