No exploitation reportedFix available

CVE-2017-6519

No exploitation reported by the sources we read.

Published2017-05-01
WeaknessCWE-346

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive information from the responding device via port-5353 UDP packets. NOTE: this may overlap CVE-2015-2809.

Timeline

dates in UTC

2017-05-0101:59CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-6519?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-6519?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Canonical ubuntu linux

Branch	Affected	Fixed in	Source
12.4	= 12.04	no fix published	NVD
14.4	= 14.04	no fix published	NVD
16.4	= 16.04	no fix published	NVD
18.4	= 18.04	no fix published	NVD
18.10	= 18.10	no fix published	NVD

Avahi

Branch	Affected	Fixed in	Source
0.6	≤ 0.6.32	no fix published	NVD
0.7	= 0.7	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

bugzilla.redhat.comPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2025-12-03
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.19.12025-12-03
NVDCVSS 3.09.1read 2026-10-23
NVDCVSS 2.06.4read 2026-10-23
CISA-ADPweakness (CWE)CWE-3462025-12-03
NVDweakness (CWE)CWE-346read 2026-10-23
FIRST EPSSEPSS score3.2 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Published: 2017-05-01
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-6519?

Is CVE-2017-6519 actively exploited?

Active exploitation of CVE-2017-6519 has not been confirmed. Its EPSS score was 3.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-6519?

CVE-2017-6519 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

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