Informazioni sul CVE-2020-9054
ZyXEL NAS products running firmware version 5.21 and earlier are vulnerable to pre-authentication command injection in weblogin.cgi
CWE ID: CWE-78
Base Score (CVSS): N/A
CVE: CVE-2020-9054
Descrizione: Multiple ZyXEL network-attached storage (NAS) devices running firmware version 5.21 contain a pre-authentication command injection vulnerability, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable device. ZyXEL NAS devices achieve authentication by using the weblogin.cgi CGI executable. This program fails to properly sanitize the username parameter that is passed to it. If the username parameter contains certain characters, it can allow command injection with the privileges of the web server that runs on the ZyXEL device. Although the web server does not run as the root user, ZyXEL devices include a setuid utility that can be leveraged to run any command with root privileges. As such, it should be assumed that exploitation of this vulnerability can lead to remote code execution with root privileges. By sending a specially-crafted HTTP POST or GET request to a vulnerable ZyXEL device, a remote, unauthenticated attacker may be able to execute arbitrary code on the device. This may happen by directly connecting to a device if it is directly exposed to an attacker. However, there are ways to trigger such crafted requests even if an attacker does not have direct connectivity to a vulnerable devices. For example, simply visiting a website can result in the compromise of any ZyXEL device that is reachable from the client system. Affected products include: NAS326 before firmware V5.21(AAZF.7)C0 NAS520 before firmware V5.21(AASZ.3)C0 NAS540 before firmware V5.21(AATB.4)C0 NAS542 before firmware V5.21(ABAG.4)C0 ZyXEL has made firmware updates available for NAS326, NAS520, NAS540, and NAS542 devices. Affected models that are end-of-support: NSA210, NSA220, NSA220+, NSA221, NSA310, NSA310S, NSA320, NSA320S, NSA325 and NSA325v2
Vettore di attacco
Punteggio CVSS
Il CVSS è un sistema di valutazione che misura la gravità di una vulnerabilità informatica considerando fattori come l’impatto potenziale, la probabilità di attacco e la facilità di esecuzione.
Riassunto: .
Dettaglio del Vettore
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Riferimenti esterni
- https://cwe.mitre.org/data/definitions/78.html
- https://www.zyxel.com/support/remote-code-execution-vulnerability-of-NAS-products.shtml
- https://kb.cert.org/vuls/id/498544/
- https://kb.cert.org/artifacts/cve-2020-9054.html
- https://krebsonsecurity.com/2020/02/zyxel-fixes-0day-in-network-storage-devices/
Prodotti interessati
- ZyXEL – NAS326
- ZyXEL – NAS520
- ZyXEL – NAS540
- ZyXEL – NAS542
- ZyXEL – NSA210
- ZyXEL – NSA220
- ZyXEL – NSA220+
- ZyXEL – NSA221
- ZyXEL – NSA310
- ZyXEL – NSA320
- ZyXEL – NSA320S
- ZyXEL – NSA325
- ZyXEL – NSA325v2
Relazioni con altri prodotti
Produttore:ZyXEL
Prodotto: NAS326
Anno: 2020
CWE: CWE-78
CVSS: 0.0
Produttore:ZyXEL
Prodotto: NAS520
Anno: 2020
CWE: CWE-78
CVSS: 0.0
Produttore:ZyXEL
Prodotto: NAS540
Anno: 2020
CWE: CWE-78
CVSS: 0.0
Produttore:ZyXEL
Prodotto: NAS542
Anno: 2020
CWE: CWE-78
CVSS: 0.0
Produttore:ZyXEL
Prodotto: NSA210
Anno: 2020
CWE: CWE-78
CVSS: 0.0
Produttore:ZyXEL
Prodotto: NSA220
Anno: 2020
CWE: CWE-78
CVSS: 0.0
Produttore:ZyXEL
Prodotto: NSA220+
Anno: 2020
CWE: CWE-78
CVSS: 0.0
Produttore:ZyXEL
Prodotto: NSA221
Anno: 2020
CWE: CWE-78
CVSS: 0.0
Produttore:ZyXEL
Prodotto: NSA310
Anno: 2020
CWE: CWE-78
CVSS: 0.0
Produttore:ZyXEL
Prodotto: NSA320
Anno: 2020
CWE: CWE-78
CVSS: 0.0
Produttore:ZyXEL
Prodotto: NSA320S
Anno: 2020
CWE: CWE-78
CVSS: 0.0
Produttore:ZyXEL
Prodotto: NSA325
Anno: 2020
CWE: CWE-78
CVSS: 0.0
Produttore:ZyXEL
Prodotto: NSA325v2
Anno: 2020
CWE: CWE-78
CVSS: 0.0