dnsmasq Packet use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in dnsmasq. The affected element is an unknown function of the component Packet Handler. The manipulation leads to use after free. This vulnerability is documented as CVE-2022-0934. The attack can be initiated remotely. There is not any exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in dnsmasq (Domain Name Software) (version now known). It has been rated as problematic. This issue affects some unknown processing of the component Packet Handler. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is availability. The summary by CVE is:

A single-byte, non-arbitrary write/use-after-free flaw was found in dnsmasq. This flaw allows an attacker who sends a crafted packet processed by dnsmasq, potentially causing a denial of service.

The weakness was released 08/29/2022. The advisory is shared at access.redhat.com. The identification of this vulnerability is CVE-2022-0934 since 03/11/2022. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 211973 (Debian dla-3974 : dnsmasq - security update), which helps to determine the existence of the flaw in a target environment.

Applying the patch 03345ecefeb0d82e3c3a4c28f27c3554f0611b39 is able to eliminate this problem. The bugfix is ready for download at thekelleys.org.uk.

The vulnerability is also documented in the vulnerability database at Tenable (211973). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 211973
Nessus Name: Debian dla-3974 : dnsmasq - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 03345ecefeb0d82e3c3a4c28f27c3554f0611b39

Timelineinfo

03/11/2022 🔍
08/29/2022 +170 days 🔍
08/29/2022 +0 days 🔍
06/10/2025 +1016 days 🔍

Sourcesinfo

Advisory: access.redhat.com
Status: Confirmed

CVE: CVE-2022-0934 (🔍)
GCVE (CVE): GCVE-0-2022-0934
GCVE (VulDB): GCVE-100-207521

Entryinfo

Created: 08/29/2022 21:24
Updated: 06/10/2025 16:35
Changes: 08/29/2022 21:24 (40), 10/09/2022 13:59 (11), 11/30/2024 16:35 (16), 06/10/2025 16:35 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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