CVE-2020-24034 Detail

Current Description

Sagemcom F@ST 5280 routers using firmware version 1.150.61 have insecure deserialization that allows any authenticated user to perform a privilege escalation to any other user. By making a request with valid sess_id, nonce, and ha1 values inside of the serialized session cookie, an attacker may alter the user value inside of this cookie, and assume the role and permissions of the user specified. By assuming the role of the user internal, which is inaccessible to end users by default, the attacker gains the permissions of the internal account, which includes the ability to flash custom firmware to the router, allowing the attacker to achieve a complete compromise.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  8.8 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H


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Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://packetstormsecurity.com/files/159026/Sagemcom-F-ST-5280-Privilege-Escalation.html Exploit  Third Party Advisory  VDB Entry 
http://seclists.org/fulldisclosure/2020/Sep/3 Mailing List  Third Party Advisory 
https://seclists.org/fulldisclosure/2020/Sep/3 Mailing List  Third Party Advisory 
https://support.sagemcom.com/fr/haut-debit Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-502 Deserialization of Untrusted Data cwe source acceptance level NIST  

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-24034
NVD Published Date:
09/01/2020
NVD Last Modified:
09/11/2020
Source:
MITRE