Authenticated code execution via unchecked curTime copy
Published Jun 20, 2025 · Updated Jun 23, 2025
Stack-based buffer overflow in D-Link DIR-619L 2.06B01 allows remote authenticated users to execute code via a crafted curTime value. The formWlanGuestSetup handler in the boa web server copies curTime into a fixed-size local stack buffer without validating its length, allowing the input to overwrite the function's return address. Access to the router's web configuration is required; exploitation can crash the router or redirect control flow to attacker-controlled code.
Summary
What happened
Stack-based buffer overflow in D-Link DIR-619L 2.06B01 allows remote authenticated users to execute code via a crafted curTime value. The formWlanGuestSetup handler in the boa web server copies curTime into a fixed-size local stack buffer without validating its length, allowing the input to overwrite the function's return address. Access to the router's web configuration is required; exploitation can crash the router or redirect control flow to attacker-controlled code.
The record
- CVE
- CVE-2025-6370
- Published
- Jun 20, 2025
- Updated
- Jun 23, 2025
- Vendor
- D-Link
- Product
- DIR-619L
- Classifications
- CWE-119, CWE-121, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 20, 2025CVE publishedPublication date reported by the CVE source.
- Jun 23, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=2.06B01
What conditions does exploitation require?
What is affected?
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
- DIR-619L formWlanGuestSetup oversized curTime proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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