Avahi
CVE-2021-3468
MEDIUM
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
1DescriptionNVD
A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service, which becomes unresponsive after this flaw is triggered.
AnalysisAI
A flaw was found in avahi in versions 0.6 up to 0.8. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
Technical ContextAI
This vulnerability is classified under CWE-835. A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service, which becomes unresponsive after this flaw is triggered. Affected products include: Avahi, Debian Debian Linux. Version information: up to 0.8..
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that a
Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In 0.9-rc2
A vulnerability was found in the avahi library. Rated medium severity (CVSS 5.5), this vulnerability is low attack compl
A flaw was found in avahi 0.8-5. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public e
avahi-daemon-check-dns.sh in the Debian avahi package through 0.8-4 is executed as root via /etc/network/if-up.d/avahi-d
Avahi daemon versions 0.9rc2 and below can be remotely crashed through a denial of service attack by sending a specially
Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In 0.9-rc2
Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In 0.9-rc2
A vulnerability was found in Avahi. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No ve
A vulnerability was found in Avahi. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No ve
A vulnerability was found in Avahi. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No ve
A vulnerability was found in Avahi. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No ve
Same technique Denial Of Service
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External POC / Exploit Code
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