CVE-2020-6879 Missing authorization in ZXHN F670L
Attackers can bypass front-end restrictions to tamper with static routing parameters on ZTE routers by sending crafted POST requests to the backend.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-6879?
CVE-2020-6879 is a low-severity missing authorization vulnerability in ZXHN F670L, published on 19 Nov 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Some ZTE devices have input verification vulnerabilities. The devices support configuring a static prefix through the web management page. The restriction of the front-end code can be bypassed by constructing a POST request message and sending the request to the creation of a static routing rule configuration interface. The WEB service backend fails to effectively verify the abnormal input. As a result, the attacker can successfully use the vulnerability to tamper parameter values. This affects: ZXHN Z500 V1.0.0.2B1.1000 and ZXHN F670L V1.1.10P1N2E. This is fixed in ZXHN Z500 V1.0.1.1B1.1000 and ZXHN F670L V1.1.10P2N2.
Weakness: CWE-20
Which versions are affected by CVE-2020-6879?
It affects 2 products.
Products include Zte Zxhn F670l Firmware, Zte Zxhn Z500 Firmware.
How do I fix CVE-2020-6879?
No fix has been published for CVE-2020-6879 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2020-6879 being exploited?
There is no known exploitation of CVE-2020-6879 in the wild and no public exploit code.
Sources
Also known as GHSA-3jm3-wf93-rc5x.