Vulnerability identifier: #VU17349
Vulnerability risk: Low
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Avahi
Universal components / Libraries /
Libraries used by multiple products
Vendor: avahi.org
Description
The vulnerability allows remote attackers to perform a denial of service (DoS) attack.
The vulnerability exists due to avahi-daemon inadvertently responds to IPv6 unicast queries with source addresses that are not on-link. A remote attacker can submit specially crafted port-5353 UDP packet to trigger traffic amplification and cause the service to crash.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Avahi: 0.6.32 - 0.7
External links
http://github.com/lathiat/avahi/issues/203
http://github.com/lathiat/avahi/issues/203#issuecomment-449536790
http://www.secfu.net/advisories
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.