CVE-2020-24034 Deserialization in n/a
Authenticated users can exploit insecure deserialization in session cookies to escalate privileges to internal accounts and flash custom firmware.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-24034?
CVE-2020-24034 is a high-severity unsafe deserialization vulnerability in n/a, published on 1 Sep 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-502
Which versions are affected by CVE-2020-24034?
It affects 1 product.
Products include Sagemcom F\@st 5280 Router Firmware.
How do I fix CVE-2020-24034?
No fix has been published for CVE-2020-24034 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2020-24034 being exploited?
There is no known exploitation of CVE-2020-24034 in the wild and no public exploit code.
Sources
Also known as GHSA-qh8j-94w4-68q5.