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CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Weakness Summary
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
- Canonical source: MITRE CWE-120 (opens in a new tab)
- Published Atomicorp CVE observations: 3
- Distinct affected products in those observations: 2
- Active Atomicorp rules associated with this weakness: 15
Atomicorp Research Context
Atomicorp has published CVE-specific research observations associated with this weakness category. Each linked CVE page states whether the tested request was detected or blocked and is the authoritative customer-facing finding.
The CVEs and rules shown here are selected published examples, not a complete list of Atomicorp protections. If a CWE, CVE, or rule is absent from this page, no conclusion should be drawn about whether Atomicorp protects against that weakness or attack method.
A CWE describes a class of software weakness. It does not identify one exploit request, and association with a CWE does not mean that every vulnerability or exploitation path in that category is detected or blocked.
Selected Published CVE Observations
| CVE | Vulnerability | Product | Atomicorp finding | Observed rules |
|---|---|---|---|---|
| CVE-2019-11043 | PHP-FPM Path Info Buffer Underflow - Remote Code Execution | php | Attack Blocked by Atomicorp | 390714 |
| CVE-2020-11984 | Apache HTTP Server - Remote Code Execution | http server | Attack Blocked by Atomicorp | 344363 , 390614 , 390626 , 390724 |
| CVE-2026-36796 | Shenzhen Tenda Technology Co., Ltd Tenda G0 v15.11.0.5 was discovered to Denial of Service Vulnerability | - | Attack Blocked by Atomicorp | 340014 , 340029 , 340193 , 344360 , 344361 , 344363 , 344364 , 344366 , 344370 , 347009 , 393655 |
Associated Atomicorp WAF Rules
| Rule | Status | Behavior |
|---|---|---|
| 340014 | Active | disruptive (deny) |
| 340029 | Active | disruptive (deny) |
| 340193 | Active | disruptive (deny) |
| 344360 | Active | disruptive (deny) |
| 344361 | Active | disruptive (deny) |
| 344363 | Active | disruptive (deny) |
| 344364 | Active | disruptive (deny) |
| 344366 | Active | disruptive (deny) |
| 344370 | Active | disruptive (deny) |
| 347009 | Active | disruptive (deny) |
| 390614 | Active | disruptive (deny) |
| 390626 | Active | disruptive (deny) |
| 390714 | Active | disruptive (deny) |
| 390724 | Active | disruptive (deny) |
| 393655 | Active | disruptive (deny) |
Related MITRE CAPEC Context
MITRE associates this CWE with the following attack-pattern entries. These taxonomy relationships are context, not Atomicorp coverage claims:
CAPEC-10 (opens in a new tab) , CAPEC-100 (opens in a new tab) , CAPEC-14 (opens in a new tab) , CAPEC-24 (opens in a new tab) , CAPEC-42 (opens in a new tab) , CAPEC-44 (opens in a new tab) , CAPEC-45 (opens in a new tab) , CAPEC-46 (opens in a new tab) , CAPEC-47 (opens in a new tab) , CAPEC-67 (opens in a new tab) , CAPEC-8 (opens in a new tab) , CAPEC-9 (opens in a new tab) , CAPEC-92 (opens in a new tab)