CVE-2021-3502

EUVD-2021-26822
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 8%
Affected Products (NVD)
VendorProductVersion
avahiavahi
0.8-5
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
avahi
bookworm
0.8-10
fixed
bullseye
0.8-5+deb11u2
fixed
buster
not-affected
sid
0.8-13
fixed
stretch
not-affected
trixie
0.8-13
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
avahi
bionic
not-affected
focal
not-affected
groovy
Fixed 0.8-3ubuntu1.1
released
hirsute
Fixed 0.8-5ubuntu3.1
released
impish
Fixed 0.8-5ubuntu4
released
jammy
Fixed 0.8-5ubuntu4
released
trusty
not-affected
xenial
not-affected
Common Weakness Enumeration
References
https://bugzilla.redhat.com/show_bug.cgi?id=1946914
https://github.com/lathiat/avahi/issues/338
https://bugzilla.redhat.com/show_bug.cgi?id=1946914
https://github.com/lathiat/avahi/issues/338