PT-2021-17159 · Thttpd · Thttpd

Jasperla · Published 2021-02-07 · Updated 2021-02-09 · CVE-2021-26843

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: sthttpd versions prior to 2.27.1

Description: An issue in the de dotdot function can cause a Denial-of-Service (daemon crash) due to overlapping memory ranges being passed to memcpy when the strcpy function is implemented with memcpy. This can be triggered with an HTTP GET request for a crafted filename.

Recommendations: For versions prior to 2.27.1, update to version 2.27.1 or later to resolve the issue. As a temporary workaround, consider restricting access to the de dotdot function to minimize the risk of exploitation.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2021-26843

Affected Products

Thttpd

References · 4

• 🔥 https://github.com/blueness/sthttpd/issues/14 · Exploit
• https://osv.dev/vulnerability/CVE-2021-26843 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-26843 · Security Note
• https://t.me/cvenotify/9552 · Telegram Post