Vulnerability CVE-2017-6519
Published: 2017-04-30   Modified: 2017-05-01

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.

Type:

CWE-346

 (Origin Validation Error)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.4/10
4.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
Partial
Affected software
Canonical -> Ubuntu linux 
Avahi -> Avahi 

 References:
https://bugzilla.redhat.com/show_bug.cgi?id=1426712
https://github.com/lathiat/avahi/issues/203
https://github.com/lathiat/avahi/issues/203#issuecomment-449536790
https://usn.ubuntu.com/3876-1/
https://usn.ubuntu.com/3876-2/
https://www.secfu.net/advisories
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