VIR Vulnerability Intelligence Relay

CVE-2017-6519

critical
Published 2017-05-01 · Modified 2026-05-13
💬 Discuss on Community ✚ Propose mitigation
CVSS v3
9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS v4 NEW
—
not yet in upstream
VIR risk
9.1

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.

Predictions

Exploit likelihood
94%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact
suse SUSE Affected 1 release
VersionStatusFixed in
— Affected —
ubuntu Ubuntu Affected 5 releases
VersionStatusFixed in
18.10 Affected —
18.04 Affected —
16.04 Affected —
14.04 Affected —
12.04 Affected —
debian Debian Fixed 5 releases
VersionStatusFixed in
trixie Fixed 0.7-5
sid Fixed 0.7-5
forky Fixed 0.7-5
bullseye Fixed 0.7-5
bookworm Fixed 0.7-5

Application impact
VendorProductVersionsFixed
avahiavahi{"endIncluding":"0.6.32"}
avahiavahi0.7

References

CWEs

CWE-346

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.