Service interruption via oversized firewall configuration value
Published Mar 18, 2024 · Updated Aug 15, 2024
Stack-based buffer overflow in Tenda AC18 firmware 15.03.05.05 allows remote attackers to interrupt service via a crafted POST request. The formSetFirewallCfg handler passes the attacker-controlled firewallEn value to strcpy, which copies it into a fixed four-byte destination buffer. Attackers need adjacent-network reachability but no credentials or user interaction; an oversized value overwrites the handler's stack and disrupts availability.
Summary
What happened
Stack-based buffer overflow in Tenda AC18 firmware 15.03.05.05 allows remote attackers to interrupt service via a crafted POST request. The formSetFirewallCfg handler passes the attacker-controlled firewallEn value to strcpy, which copies it into a fixed four-byte destination buffer. Attackers need adjacent-network reachability but no credentials or user interaction; an oversized value overwrites the handler's stack and disrupts availability.
The record
- CVE
- CVE-2024-28547
- Published
- Mar 18, 2024
- Updated
- Aug 15, 2024
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- AC18 Firmware
- Classifications
- CWE-121, T1499.004
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 18, 2024CVE publishedPublication date reported by the CVE source.
- Aug 15, 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=15.03.05.05
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
- formSetFirewallCfg oversized firewallEn POST proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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