CVE-2021-3502

Public Exploit

Description

A flaw was found in avahi 0.8-5. A reachable assertion is present in avahi_s_host_name_resolver_start function allowing a local attacker to crash the avahi service by requesting hostname resolutions through the avahi socket or dbus methods for invalid hostnames. The highest threat from this vulnerability is to the service availability.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.03%
Third-Party Advisory redhat.com Third-Party Advisory github.com
Affected: n/a avahi
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1946914 issue tracking patch exploit third party advisory
https://github.com/lathiat/avahi/issues/338 third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-3502?
CVE-2021-3502 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3502?
To fix CVE-2021-3502, 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-2021-3502 being actively exploited in the wild?
It is possible that CVE-2021-3502 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3502?
CVE-2021-3502 affects n/a avahi.
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