Dnsmasq 2.86 fuzz_util.c extract_name heap-based overflow ⚔ [Disputed]

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Dnsmasq 2.86. This issue affects the function extract_name of the file fuzz_util.c. Such manipulation leads to heap-based overflow. This vulnerability is uniquely identified as CVE-2021-45953. No exploit exists. The actual existence of this vulnerability is currently in question.

Detailsinfo

A vulnerability was found in Dnsmasq 2.86 (Domain Name Software). It has been rated as critical. Affected by this issue is the function extract_name of the file fuzz_util.c. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 01/01/2022. The advisory is shared for download at bugs.chromium.org. This vulnerability is handled as CVE-2021-45953 since 12/31/2021. There are known technical details, but no exploit is available.

The real existence of this vulnerability is still doubted at the moment.

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

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.6

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / 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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/31/2021 🔍
01/01/2022 +1 days 🔍
01/01/2022 +0 days 🔍
08/04/2024 +946 days 🔍

Sourcesinfo

Advisory: bugs.chromium.org
Status: Confirmed
Confirmation: 🔍
Disputed: 🔍

CVE: CVE-2021-45953 (🔍)
GCVE (CVE): GCVE-0-2021-45953
GCVE (VulDB): GCVE-100-189512

Entryinfo

Created: 01/01/2022 10:15
Updated: 08/04/2024 07:34
Changes: 01/01/2022 10:15 (39), 01/05/2022 11:44 (1), 08/04/2024 07:34 (35)
Complete: 🔍
Cache ID: 216::103

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