Root code execution via webproc stack overflow
Published Oct 25, 2021 · Updated Aug 4, 2024
Stack-based buffer overflow in D-Link DAP-2020 1.01rc001 allows attackers to execute code as root from an adjacent network. The webproc endpoint on TCP port 80 copies user-supplied data into a fixed-length stack buffer without first validating its length. No authentication or user interaction is required, but the attacker must be adjacent to the device's network; successful exploitation grants root-level control over the appliance.
Summary
What happened
Stack-based buffer overflow in D-Link DAP-2020 1.01rc001 allows attackers to execute code as root from an adjacent network. The webproc endpoint on TCP port 80 copies user-supplied data into a fixed-length stack buffer without first validating its length. No authentication or user interaction is required, but the attacker must be adjacent to the device's network; successful exploitation grants root-level control over the appliance.
The record
- CVE
- CVE-2021-34861
- Published
- Oct 25, 2021
- Updated
- Aug 4, 2024
- Vendor
- D-Link
- Product
- DAP-2020
- Classifications
- CWE-121
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 25, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.01rc001
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo