Vulnerability in Avahi
CVE-2021-3468
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Avahi
- Debian Linux — versions 9.0
- Avahi — versions All avahi versions 0.6 up to 0.8
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Issue Tracking)
- lists.debian.org/debian-lts-announce/2022/06/msg00009.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/06/msg00028.html
Frequently asked questions
- What is CVE-2021-3468?
- CVE-2021-3468 is a medium-severity vulnerability in Avahi, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2021-06-02.
- How severe is CVE-2021-3468?
- Medium severity. CVSS v3 base score is 5.5 out of 10.