Vulnerability in Avahi
CVE-2017-6519
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.032 (87.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000
Affected products
- Avahi — versions 0.7
- Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
Weakness classification (CWE)
References
- github.com/lathiat/avahi/issues/203 (Third Party Advisory)
- usn.ubuntu.com/3876-1/ (vendor-advisory, Third Party Advisory)
- github.com/lathiat/avahi/issues/203 (Exploit, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- usn.ubuntu.com/3876-2/ (vendor-advisory, Third Party Advisory)
- www.secfu.net/advisories (Third Party Advisory)
- lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e6… (mailing-list)
Frequently asked questions
- What is CVE-2017-6519?
- CVE-2017-6519 is a critical-severity vulnerability in Avahi, classified under Origin Validation Error. CVSS score: 9.1/10. Published 2017-05-01.
- How severe is CVE-2017-6519?
- Critical severity. CVSS v3 base score is 9.1 out of 10.