CVE-2017-6519

Public Exploit

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.

Category

9.1
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.50% Top 20%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/lathiat/avahi/issues/203#issuecomment-449536790 third party advisory
https://usn.ubuntu.com/3876-1/ third party advisory vendor advisory
https://github.com/lathiat/avahi/issues/203 third party advisory exploit
https://bugzilla.redhat.com/show_bug.cgi?id=1426712 patch third party advisory issue tracking
https://usn.ubuntu.com/3876-2/ third party advisory vendor advisory
https://www.secfu.net/advisories third party advisory
https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E mailing list

Frequently Asked Questions

What is the severity of CVE-2017-6519?
CVE-2017-6519 has been scored as a critical severity vulnerability.
How to fix CVE-2017-6519?
To fix CVE-2017-6519, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-6519 being actively exploited in the wild?
It is possible that CVE-2017-6519 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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