VDB-176261 · CVE-2021-3468 · Nessus 242766

Avahi 0.6/0.7/0.8 Client Connection client_work infinite loop

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.3	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Avahi 0.6/0.7/0.8. This affects the function client_work of the component Client Connection Handler. The manipulation leads to infinite loop. This vulnerability is documented as CVE-2021-3468. The attack needs to be performed locally. There is not any exploit available.

Detailsinfo

A vulnerability was found in Avahi 0.6/0.7/0.8 and classified as problematic. This issue affects the function client_work of the component Client Connection Handler. The manipulation with an unknown input leads to a infinite loop vulnerability. Using CWE to declare the problem leads to CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Impacted is availability.

The weakness was released 06/02/2021. The advisory is shared at bugzilla.redhat.com. The identification of this vulnerability is CVE-2021-3468. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 242766 (NewStart CGSL MAIN 7.02 : avahi Multiple Vulnerabilities (NS-SA-2025-0174)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (242766). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

Avahi

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 242766
Nessus Name: NewStart CGSL MAIN 7.02 : avahi Multiple Vulnerabilities (NS-SA-2025-0174)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/26/2021 🔍
06/02/2021 +67 days 🔍
06/02/2021 +0 days 🔍
07/26/2025 +1515 days 🔍

Sourcesinfo

Advisory: bugzilla.redhat.com
Status: Not defined

CVE: CVE-2021-3468 (🔍)
GCVE (CVE): GCVE-0-2021-3468
GCVE (VulDB): GCVE-100-176261

Entryinfo

Created: 06/02/2021 22:56
Updated: 07/26/2025 07:00
Changes: 06/02/2021 22:56 (36), 06/05/2021 16:20 (2), 07/26/2025 07:00 (16)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.