Authenticated code execution via unchecked curTime copy
Published Sep 11, 2023 · Updated Sep 26, 2024
Stack-based buffer overflow in the login handler of D-Link DIR-619L 2.06beta allows remote authenticated users to execute code. The formLogin redirect path passes the curTime request value to sprintf, which copies it into a stack buffer without checking its length. An attacker must reach the router's LAN-side web interface and authenticate; an oversized value can overwrite the return address.
Summary
What happened
Stack-based buffer overflow in the login handler of D-Link DIR-619L 2.06beta allows remote authenticated users to execute code. The formLogin redirect path passes the curTime request value to sprintf, which copies it into a stack buffer without checking its length. An attacker must reach the router's LAN-side web interface and authenticate; an oversized value can overwrite the return address.
The record
- CVE
- CVE-2020-19320
- Published
- Sep 11, 2023
- Updated
- Sep 26, 2024
- Vendor
- D-Link Corporation
- Product
- DIR-619L
- Classifications
- CWE-120, T1210
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 11, 2023CVE publishedPublication date reported by the CVE source.
- Sep 26, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=b_2.06beta
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
- dlink-619l-buffer_overflow proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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