CVE-2021-3502
"Avahi Remote Crash Denial of Service"
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.
INFO
Published Date :
May 7, 2021, 12:15 p.m.
Last Modified :
Nov. 21, 2024, 6:21 a.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | LOW | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Avahi packages.
- Restart the Avahi service.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-3502.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1946914 | Exploit Issue Tracking Patch Third Party Advisory |
| https://github.com/lathiat/avahi/issues/338 | Exploit Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=1946914 | Exploit Issue Tracking Patch Third Party Advisory |
| https://github.com/lathiat/avahi/issues/338 | Exploit Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-3502 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-3502
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-3502 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-3502 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=1946914 Added Reference https://github.com/lathiat/avahi/issues/338 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Removed CWE Red Hat, Inc. CWE-476 -
Initial Analysis by [email protected]
May. 17, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1946914 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1946914 Exploit, Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://github.com/lathiat/avahi/issues/338 No Types Assigned https://github.com/lathiat/avahi/issues/338 Exploit, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:avahi:avahi:0.8-5:*:*:*:*:*:*:*
Vulnerability Scoring Details
Base CVSS Score: 5.5
Base CVSS Score: 2.1
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.03 }} -0.01%
score
0.05862
percentile