CVE-2021-34861
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 webproc endpoint, which listens on TCP port 80 by default. 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-12104.
Overview
- CVE ID
- CVE-2021-34861
- 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-21-977/ | Third Party Advisory VDB Entry |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-34861 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34861 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:49:33 | Added to TrackCVE | |||
| 2022-12-05 13:14:16 | 2021-10-25T17:15Z | 2021-10-25T17:15:08 | CVE Published Date | updated |
| 2022-12-05 13:14:16 | 2021-10-27T15:44:46 | CVE Modified Date | updated | |
| 2022-12-05 13:14:16 | Analyzed | Vulnerability Status | updated | |
| 2023-04-26 19:21:09 | 2023-04-26T18:55:30 | CVE Modified Date | updated |