CVE-2021-26843
Reported by mitre · Published February 7, 2021
An issue was discovered in sthttpd through 2.27.1. On systems where the strcpy function is implemented with memcpy, the de_dotdot function may cause a Denial-of-Service (daemon crash) due to overlapping memory ranges being passed to memcpy. This can triggered with an HTTP GET request for a crafted filename. NOTE: this is similar to CVE-2017-10671, but occurs in a different part of the de_dotdot function.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| sthttpd | sthttpd_project | 2.27.1 |
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
| n/a | n/a | * |
Timeline
- Feb 7, 2021 CVE Published
- Apr 14, 2021 EPSS Score (30 in total, the first dated here)
- Aug 3, 2024 CVE Updated
- Apr 4, 2026 Security Advisory
- Aug 7, 2026 Coalition ESS Score
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The same record, from the CLI:
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