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CVE-2021-34863

HIGH
Published 2021-10-25T17:10:50
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CVSS Score

V3.0
8.8
/10
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2023.03.01
0.004
probability
of exploitation in the wild

There is a 0.4% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-01-25
Exploit Probability
Percentile: 0.729
Higher than 72.9% of all CVEs

Attack Vector Metrics

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

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:page 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-13271.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

D-Link

DAP-2020

Affected Versions:

1.01rc001

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-8v93-c335-x4h3

Advisory Details

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:page 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-13271.

CVSS Scoring

CVSS Score

7.5

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-34863
WEB https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201
WEB https://www.zerodayinitiative.com/advisories/ZDI-21-979

Advisory provided by GitHub Security Advisory Database. Published: May 24, 2022, Modified: April 26, 2023

References

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201
https://www.zerodayinitiative.com/advisories/ZDI-21-979/
Published: 2021-10-25T17:10:50
Last Modified: 2024-08-04T00:26:54.606Z
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