CVE-2021-26843 - CVE House
Back to Database
Status published High CVE-2021-26843

An issue was discovered in sthttpd through 2.27.1. On systems...

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2021-26843

Credits & Attribution

No credits recorded in the NVD database.

References

More from sthttpd project

View All →
CVE-2017-10671
Heap-based Buffer Overflow in the de_dotdot function in libhttpd.c in...
High 7.8

Affected Vendor

sthttpd project

View all reports →

Affected Software

sthttpd
Vulnerable Versions:
0

Timeline

Official Publish: February 7th, 2021
Last Modified: August 3rd, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.