Dnsmasq 2.86 fuzz_rfc1035.c answer_request heap-based overflow ⚔ [Disputed]

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Dnsmasq 2.86. This affects the function answer_request of the file fuzz_rfc1035.c. The manipulation results in heap-based overflow. This vulnerability is identified as CVE-2021-45957. There is not any exploit available. There is ongoing doubt regarding the real existence of this vulnerability.

Detailsinfo

A vulnerability, which was classified as critical, was found in Dnsmasq 2.86 (Domain Name Software). Affected is the function answer_request of the file fuzz_rfc1035.c. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as 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(). This is going to have an impact on confidentiality, integrity, and availability.

The weakness was released 01/01/2022. The advisory is shared for download at bugs.chromium.org. This vulnerability is traded as CVE-2021-45957 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.

Once again VulDB remains the best source for vulnerability data.

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-2021-45957 (🔍)
GCVE (CVE): GCVE-0-2021-45957
GCVE (VulDB): GCVE-100-189516

Entryinfo

Created: 01/01/2022 10:16
Updated: 08/04/2024 07:34
Changes: 01/01/2022 10:16 (39), 01/05/2022 12:14 (1), 08/04/2024 07:34 (35)
Complete: 🔍
Cache ID: 216::103

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