CVE-2017-6519

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Summary

CVECVE-2017-6519
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2017-05-01 01:59:00 UTC
Updated2025-12-03 22:15:49 UTC
Descriptionavahi-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.

Risk And Classification

Primary CVSS: v3.1 9.1 CRITICAL from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Problem Types: CWE-346 | n/a | CWE-346 CWE-346 Origin Validation Error

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
3.0[email protected]Primary9.1CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
2.0[email protected]Primary6.4AV:N/AC:L/Au:N/C:P/I:N/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
Partial

AV:N/AC:L/Au:N/C:P/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Avahi Avahi 0.7 All All All
Application Avahi Avahi All All All All
Operating System Canonical Ubuntu Linux 12.04 All All All
Operating System Canonical Ubuntu Linux 14.04 All All All
Operating System Canonical Ubuntu Linux 16.04 All All All
Operating System Canonical Ubuntu Linux 18.04 All All All
Operating System Canonical Ubuntu Linux 18.10 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
USN-3876-1: Avahi vulnerabilities | Ubuntu security notices | Ubuntu af854a3a-2127-422b-91ae-364da2661108 usn.ubuntu.com Third Party Advisory
1426712 – (CVE-2017-6519) CVE-2017-6519 avahi: Multicast DNS responds to unicast queries outside of local network af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Patch, Third Party Advisory
Pony Mail! af854a3a-2127-422b-91ae-364da2661108 lists.apache.org
Missing link-local checks in Avahi makes DDoS with mDNS traffic reflection possible · Issue #203 · lathiat/avahi · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Exploit, Third Party Advisory
Missing link-local checks in Avahi makes DDoS with mDNS traffic reflection possible · Issue #203 · lathiat/avahi · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Third Party Advisory
USN-3876-2: Avahi vulnerabilities | Ubuntu security notices af854a3a-2127-422b-91ae-364da2661108 usn.ubuntu.com Third Party Advisory
Avahi IPv6 Off-link Unicast mDNS Interaction - A few tools and articiles for IT security topics af854a3a-2127-422b-91ae-364da2661108 www.secfu.net Third Party Advisory
Pony Mail! MITRE lists.apache.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 377318 Alibaba Cloud Linux Security Update for avahi (ALINUX2-SA-2020:0045)
  • 500041 Alpine Linux Security Update for avahi
  • 503057 Alpine Linux Security Update for avahi
  • 503325 Alpine Linux Security Update for avahi
  • 503399 Alpine Linux Security Update for avahi
  • 503471 Alpine Linux Security Update for avahi
  • 503488 Alpine Linux Security Update for avahi
  • 503515 Alpine Linux Security Update for avahi
  • 503563 Alpine Linux Security Update for avahi
  • 503600 Alpine Linux Security Update for avahi
  • 503635 Alpine Linux Security Update for avahi
  • 503654 Alpine Linux Security Update for avahi
  • 505849 Alpine Linux Security Update for avahi
  • 901947 Common Base Linux Mariner (CBL-Mariner) Security Update for avahi (6322-1)
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