VDB-174706 · CVE-2021-3502 · GCVE-0-2021-3502

Avahi up to 0.8-5 Hostname Resolution avahi_s_host_name_resolver_start null pointer dereference

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 classified as problematic was found in Avahi up to 0.8-5. This issue affects the function avahi_s_host_name_resolver_start of the component Hostname Resolution Handler. Executing a manipulation can lead to null pointer dereference. This vulnerability is handled as CVE-2021-3502. It is possible to launch the attack on the local host. There is not any exploit available.

Detailsinfo

A vulnerability was found in Avahi up to 0.8-5. It has been declared as problematic. This vulnerability affects the function avahi_s_host_name_resolver_start of the component Hostname Resolution Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability.

The weakness was released 05/07/2021. The advisory is available at github.com. This vulnerability was named CVE-2021-3502. Technical details are known, but there is no available exploit.

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

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Avahi

Version

0.8-5

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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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / 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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/15/2021 🔍
05/07/2021 +22 days 🔍
05/07/2021 +0 days 🔍
05/12/2021 +5 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2021-3502 (🔍)
GCVE (CVE): GCVE-0-2021-3502
GCVE (VulDB): GCVE-100-174706

Entryinfo

Created: 05/07/2021 16:43
Updated: 05/12/2021 14:47
Changes: 05/07/2021 16:43 (36), 05/12/2021 14:47 (2)
Complete: 🔍
Cache ID: 216::103