CVE-2021-34862
CVSS V2 Medium 5.8
CVSS V3 High 8.8
Description
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2020 1.01rc001 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the var:menu parameter provided to the webproc endpoint. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-13270.
Overview
- CVE ID
- CVE-2021-34862
- Assigner
- zdi-disclosures@trendmicro.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-10-25T17:15:08
- Last Modified Date
- 2023-04-26T18:55:30
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:d-link:dap-2020_firmware:*:*:*:*:*:*:*:* | 1 | OR | 1.01 | |
| cpe:2.3:h:d-link:dap-2020:*:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:A/AC:L/Au:N/C:P/I:P/A:P
- Access Vector
- ADJACENT_NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 5.8
- Severity
- MEDIUM
- Exploitability Score
- 6.5
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- ADJACENT_NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 8.8
- Base Severity
- HIGH
- Exploitability Score
- 2.8
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201 | Patch Vendor Advisory |
| https://www.zerodayinitiative.com/advisories/ZDI-21-978/ | Third Party Advisory VDB Entry |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-34862 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34862 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:49:32 | Added to TrackCVE | |||
| 2022-12-05 13:14:20 | 2021-10-25T17:15Z | 2021-10-25T17:15:08 | CVE Published Date | updated |
| 2022-12-05 13:14:20 | 2021-10-27T16:24:13 | CVE Modified Date | updated | |
| 2022-12-05 13:14:20 | Analyzed | Vulnerability Status | updated | |
| 2023-04-26 19:21:09 | 2023-04-26T18:55:30 | CVE Modified Date | updated |