Remote code execution via unchecked SSID copy
Published Dec 1, 2021 · Updated Aug 3, 2024
Stack buffer overflow in D-Link DIR-809 firmware through 1.12WWB03 allows remote attackers to execute arbitrary code via a crafted POST request. In FUN_80040af8, the /formWlanSetup handler reads an attacker-controlled ssid_1 value and passes it to strcpy without checking its length, overflowing the local_18 stack buffer. The management HTTP interface must be network-reachable; successful exploitation grants code execution on the router without user interaction.
Summary
What happened
Stack buffer overflow in D-Link DIR-809 firmware through 1.12WWB03 allows remote attackers to execute arbitrary code via a crafted POST request. In FUN_80040af8, the /formWlanSetup handler reads an attacker-controlled ssid_1 value and passes it to strcpy without checking its length, overflowing the local_18 stack buffer. The management HTTP interface must be network-reachable; successful exploitation grants code execution on the router without user interaction.
The record
- CVE
- CVE-2021-33274
- Published
- Dec 1, 2021
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-787, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 1, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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.
Public exploit references
- D-Link DIR-809 vuln07 proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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