CVE-2023-22913 Command injection in USG FLEX series firmware
Authenticated attackers can inject commands via a CGI script to modify configuration and cause denial of service on Zyxel USG FLEX and VPN devices.
- 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-2023-22913?
CVE-2023-22913 is a high-severity command injection vulnerability in Zyxel USG FLEX series firmware, published on 24 Apr 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A post-authentication command injection vulnerability in the “account_operator.cgi” CGI program of Zyxel USG FLEX series firmware versions 4.50 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow a remote authenticated attacker to modify device configuration data, resulting in denial-of-service (DoS) conditions on an affected device.
Weakness: CWE-77
Which versions are affected by CVE-2023-22913?
It affects 11 products.
Products include Zyxel Usg Flex 100 Firmware, Zyxel Usg Flex 100w Firmware, Zyxel Usg Flex 200 Firmware, Zyxel Usg Flex 500 Firmware, Zyxel Usg Flex 50 Firmware, Zyxel Usg Flex 50w Firmware and 5 more.
How do I fix CVE-2023-22913?
No fix has been published for CVE-2023-22913 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2023-22913 being exploited?
There is no known exploitation of CVE-2023-22913 in the wild and no public exploit code.
Other vulnerabilities in Zyxel USG FLEX series firmware
Sources
Also known as GHSA-g276-jg34-q58g.