Vulnerability 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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Avahi | Avahi | <= 0.6.32 |
| Canonical | Ubuntu Linux | 12.04 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1426712Issue TrackingPatchThird Party Advisory
- https://github.com/lathiat/avahi/issues/203ExploitThird Party Advisory
- https://github.com/lathiat/avahi/issues/203#issuecomment-449536790Third Party Advisory
- https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab
- https://usn.ubuntu.com/3876-1/Third Party Advisory
- https://usn.ubuntu.com/3876-2/Third Party Advisory
- https://www.secfu.net/advisoriesThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1426712Issue TrackingPatchThird Party Advisory
- https://github.com/lathiat/avahi/issues/203ExploitThird Party Advisory
- https://github.com/lathiat/avahi/issues/203#issuecomment-449536790Third Party Advisory
- https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab
- https://usn.ubuntu.com/3876-1/Third Party Advisory
- https://usn.ubuntu.com/3876-2/Third Party Advisory
- https://www.secfu.net/advisoriesThird Party Advisory
FAQ
What is CVE-2017-6519?
CVE-2017-6519 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 (traf...
How severe is CVE-2017-6519?
CVE-2017-6519 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2017-6519?
Check the references section above for vendor advisories and patch information. Affected products include: Avahi Avahi, Canonical Ubuntu Linux.