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CVE-2020-24034

8.8 · HIGH

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.

Published Sep 1, 2020CWE-502EPSS 3.67%

Overview

CVE-2020-24034 is a high-severity vulnerability. It was published on September 1, 2020 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refpacketstormsecurity.com/files/159026/Sagemcom-F-ST-5280-Privilege-Escalation.htmlRefseclists.org/fulldisclosure/2020/Sep/3Refseclists.org/fulldisclosure/2020/Sep/3Refsupport.sagemcom.com/fr/haut-debitRefpacketstormsecurity.com/files/159026/Sagemcom-F-ST-5280-Privilege-Escalation.htmlRefseclists.org/fulldisclosure/2020/Sep/3Refseclists.org/fulldisclosure/2020/Sep/3Refsupport.sagemcom.com/fr/haut-debit

How CyberStrike helps

Frequently asked questions

What is CVE-2020-24034?

CVE-2020-24034 is a high-severity vulnerability. It was published on September 1, 2020 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2020-24034?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-24034?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-24034?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-24034 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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