CVE-2023-27991 Command injection in ATP series firmware
An authenticated attacker can execute arbitrary OS commands remotely via the CLI in Zyxel firewall 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-2023-27991?
CVE-2023-27991 is a high-severity command injection vulnerability in Zyxel ATP 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
The post-authentication command injection vulnerability in the CLI command of Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.16 through 5.35, USG20(W)-VPN firmware versions 4.16 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow an authenticated attacker to execute some OS commands remotely.
Weakness: CWE-78
Which versions are affected by CVE-2023-27991?
It affects 19 products.
Products include Zyxel Atp100 Firmware, Zyxel Atp100w Firmware, Zyxel Atp200 Firmware, Zyxel Atp500 Firmware, Zyxel Atp700 Firmware, Zyxel Atp800 Firmware and 13 more.
How do I fix CVE-2023-27991?
No fix has been published for CVE-2023-27991 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-2023-27991 being exploited?
There is no known exploitation of CVE-2023-27991 in the wild and no public exploit code.
Other vulnerabilities in Zyxel ATP series firmware
- CVE-2023-33009 Zyxel Multiple Firewalls Buffer Overflow
- CVE-2023-33010 Zyxel Multiple Firewalls Buffer Overflow
- CVE-2023-28771 Zyxel Multiple Firewalls OS Command Injection
- CVE-2022-30525 Zyxel Multiple Firewalls OS Command Injection
- CVE-2020-29583 Zyxel Multiple Products Use of Hard-Coded Credentials
Sources
Also known as GHSA-2j4f-52m8-xq9h.