CVE-2021-31875
CVSS V2 High 7.5
CVSS V3 Critical 9.8
Description
** DISPUTED ** In mjs_json.c in Cesanta MongooseOS mJS 1.26, a maliciously formed JSON string can trigger an off-by-one heap-based buffer overflow in mjs_json_parse, which can potentially lead to redirection of control flow. NOTE: the original reporter disputes the significance of this finding because "there isn’t very much of an opportunity to exploit this reliably for an information leak, so there isn’t any real security impact."
Overview
- CVE ID
- CVE-2021-31875
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2021-04-29T02:15:08
- Last Modified Date
- 2023-03-01T16:02:41
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:cesanta:mongooseos_mjs:1.26:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:P/I:P/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 7.5
- Severity
- HIGH
- Exploitability Score
- 10
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 9.8
- Base Severity
- CRITICAL
- Exploitability Score
- 3.9
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/418sec/mjs/pull/2 | Patch Third Party Advisory |
| https://github.com/cesanta/mjs/releases/tag/1.26 | Third Party Advisory |
| https://huntr.dev/bounties/1-other-mjs/ | Exploit Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-31875 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31875 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:26:38 | Added to TrackCVE | |||
| 2022-12-05 01:13:47 | 2021-04-29T02:15Z | 2021-04-29T02:15:08 | CVE Published Date | updated |
| 2022-12-05 01:13:47 | 2022-04-25T20:26:36 | CVE Modified Date | updated | |
| 2022-12-05 01:13:47 | Analyzed | Vulnerability Status | updated | |
| 2022-12-27 09:12:05 | 2022-12-27T08:15:09 | CVE Modified Date | updated | |
| 2022-12-27 09:12:05 | Analyzed | Modified | Vulnerability Status | updated |
| 2022-12-27 09:12:06 | Weakness Enumeration | update | ||
| 2022-12-27 09:12:06 | In mjs_json.c in Cesanta MongooseOS mJS 1.26, a maliciously formed JSON string can trigger an off-by-one heap-based buffer overflow in mjs_json_parse, which can potentially lead to redirection of control flow. | ** DISPUTED ** In mjs_json.c in Cesanta MongooseOS mJS 1.26, a maliciously formed JSON string can trigger an off-by-one heap-based buffer overflow in mjs_json_parse, which can potentially lead to redirection of control flow. NOTE: the original reporter disputes the significance of this finding because "there isn’t very much of an opportunity to exploit this reliably for an information leak, so there isn’t any real security impact." | Description | updated |
| 2022-12-29 11:12:24 | Modified | Undergoing Analysis | Vulnerability Status | updated |
| 2023-03-01 16:11:28 | 2023-03-01T16:02:41 | CVE Modified Date | updated | |
| 2023-03-01 16:11:28 | Undergoing Analysis | Analyzed | Vulnerability Status | updated |