CVE-2019-15799 Privilege escalation in n/a
Low-privilege SSH users can retrieve and decrypt admin passwords via tech-support command, leading to full administrative access on Zyxel switches.
- 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-2019-15799?
CVE-2019-15799 is a high-severity vulnerability in n/a, published on 14 Nov 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. User accounts created through the web interface of the device, when given non-admin level privileges, have the same level of privileged access as administrators when connecting to the device via SSH (while their permissions via the web interface are in fact restricted). This allows normal users to obtain the administrative password by running the tech-support command via the CLI: this contains the encrypted passwords for all users on the device. As these passwords are encrypted using well-known and static parameters, they can be decrypted and the original passwords (including the administrator password) can be obtained.
Weakness: CWE-269
Which versions are affected by CVE-2019-15799?
It affects 9 products.
Products include Zyxel Gs1900-10hp Firmware, Zyxel Gs1900-16 Firmware, Zyxel Gs1900-24 Firmware, Zyxel Gs1900-24e Firmware, Zyxel Gs1900-24hp Firmware, Zyxel Gs1900-48 Firmware and 3 more.
How do I fix CVE-2019-15799?
No fix has been published for CVE-2019-15799 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-15799 being exploited?
There is no known exploitation of CVE-2019-15799 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-fvpf-4m7h-jg3p.