Cesanta MJS 2.20.0 src/mjs_json.c snquote buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Cesanta MJS 2.20.0 and classified as critical. This affects the function snquote of the file src/mjs_json.c. Such manipulation leads to buffer overflow. This vulnerability is traded as CVE-2021-46526. There is no exploit available.

Detailsinfo

A vulnerability was found in Cesanta MJS 2.20.0 and classified as critical. Affected by this issue is the function snquote of the file src/mjs_json.c. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability.

The weakness was shared 01/28/2022 as 191. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2021-46526 since 01/24/2022. There are known technical details, but no exploit is available.

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

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

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

CVSSv2info

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

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

01/24/2022 🔍
01/28/2022 +4 days 🔍
01/28/2022 +0 days 🔍
01/30/2022 +2 days 🔍

Sourcesinfo

Product: github.com

Advisory: 191
Status: Confirmed

CVE: CVE-2021-46526 (🔍)
GCVE (CVE): GCVE-0-2021-46526
GCVE (VulDB): GCVE-100-191804

Entryinfo

Created: 01/28/2022 09:56
Updated: 01/30/2022 09:13
Changes: 01/28/2022 09:56 (39), 01/30/2022 09:13 (1)
Complete: 🔍
Cache ID: 216::103

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