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CVE-2017-6519 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.1 CRITICALVector:CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CNA: CISA-ADPCVSS-B:9.1 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://bugzilla.redhat.com/show_bug.cgi?id=1426712	CVE	Issue TrackingPatchThird Party Advisory
https://github.com/lathiat/avahi/issues/203	CVE	ExploitThird Party Advisory
https://github.com/lathiat/avahi/issues/203#issuecomment-449536790	CVE	Third Party Advisory
https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E	CVE
https://usn.ubuntu.com/3876-1/	CVE	Third Party Advisory
https://usn.ubuntu.com/3876-2/	CVE	Third Party Advisory
https://www.secfu.net/advisories	CVE	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1426712	[email protected]	Issue TrackingPatchThird Party Advisory
https://github.com/lathiat/avahi/issues/203	[email protected]	ExploitThird Party Advisory
https://github.com/lathiat/avahi/issues/203#issuecomment-449536790	[email protected]	Third Party Advisory
https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E	[email protected]
https://usn.ubuntu.com/3876-1/	[email protected]	Third Party Advisory
https://usn.ubuntu.com/3876-2/	[email protected]	Third Party Advisory
https://www.secfu.net/advisories	[email protected]	Third Party Advisory

see all 14 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-346	Origin Validation Error	[email protected]
CWE-346	Origin Validation Error	CISA-ADP

Affected Products

Product	Versions
avahi avahi	<= 0.6.32 0.7
CPE cpe:2.3:a:avahi:avahi:::::::: cpe:2.3:a:avahi:avahi:0.7:::::::* Remediation No remediation found in references.
canonical ubuntu linux	12.04 14.04 16.04 18.04 18.10
CPE cpe:2.3:o:canonical:ubuntu_linux:12.04::::esm::: cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts::: cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts::: cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts::: cpe:2.3:o:canonical:ubuntu_linux:18.10:::::::* Remediation No remediation found in references.

Change History

14 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
May 13, 2026	CVE Status Change	[email protected]
Dec 3, 2025	CVE Modified	CISA-ADP
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Nov 7, 2023	CVE Modified	[email protected]
Jul 29, 2020	CVE Modified	[email protected]
Oct 3, 2019	CWE Remap	[email protected]
Mar 8, 2019	Modified Analysis	[email protected]
Feb 5, 2019	CVE Modified	[email protected]
Feb 1, 2019	CVE Modified	[email protected]
Jan 30, 2019	CVE Modified	[email protected]
May 12, 2017	Initial Analysis	[email protected]