CVE-2017-6519
CRITICAL severity · CVSS 9.1 · CWE-346
9.1CVSS CRITICAL
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)3%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://bugzilla.redhat.com/show_bug.cgi?id=1426712 ↗
Additional information
- NVD record
- https://bugzilla.redhat.com/show_bug.cgi?id=1426712Patch
- https://github.com/lathiat/avahi/issues/203#issuecomment-449536790Advisory
- https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E
- https://usn.ubuntu.com/3876-1/Advisory
- https://usn.ubuntu.com/3876-2/Advisory
- https://www.secfu.net/advisoriesAdvisory
- https://github.com/lathiat/avahi/issues/203Advisory