PT-2021-20025 · Sagemcom · Sagemcom Fast3686 V2

Published 2021-01-26 · Updated 2021-02-03 · CVE-2021-3304

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Sagemcom F@ST 3686 v2 version 3.495

Description The issue is a buffer overflow that can be triggered by sending a long sessionKey to the "goform/login" URI. This can potentially allow for unauthorized access or code execution.

Recommendations For Sagemcom F@ST 3686 v2 version 3.495, as a temporary workaround, consider restricting access to the "goform/login" URI until a patch is available. Avoid using long sessionKey values in the affected API endpoint until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2021-3304

Affected Products

Sagemcom Fast3686 V2

References · 4

• 🔥 https://twitter.com/j0nh4t/status/1349649975479840769 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-3304 · Security Note
• https://osv.dev/vulnerability/CVE-2021-3304 · Vendor Advisory
• https://t.me/cvenotify/8978 · Telegram Post