CVE-2017-6519

CRITICAL EPSS 86.0%
Published May 1, 20179y ago · Modified Jun 17, 20262w ago
9.1 CVSS 3.1
Critical
Find Similar
Published May 1, 2017 9y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
9.1
Exploitability
3.9
Impact
5.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
86.0% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-346

Affected Products 7

VendorProductVersionRange
avahiavahi* ≤0.6.32
avahiavahi0.7any
canonicalubuntu_linux12.04any
canonicalubuntu_linux14.04any
canonicalubuntu_linux16.04any
canonicalubuntu_linux18.04any
canonicalubuntu_linux18.10any

References 7

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

Remediation

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1426712
    Issue TrackingPatchThird Party Advisory