CVE-2018-18931 Privilege escalation in n/a
An attacker with local access can escalate privileges to SYSTEM by replacing a service executable due to insecure default directory permissions.
- 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-2018-18931?
CVE-2018-18931 is a high-severity vulnerability in n/a, published on 29 Oct 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered in the Tightrope Media Carousel digital signage product 7.0.4.104. Due to insecure default permissions on the C:\TRMS\Services directory, an attacker who has gained access to the system can elevate their privileges from a restricted account to full SYSTEM by replacing the Carousel.Service.exe file with a custom malicious executable. This service is independent of the associated IIS web site, which means that this service can be manipulated by an attacker without losing access to vulnerabilities in the web interface (which would potentially be used in conjunction with this attack, to control the service). Once the attacker has replaced Carousel.Service.exe, the server can be restarted using the command "shutdown -r -t 0" from a web shell, causing the system to reboot and launching the malicious Carousel.Service.exe as SYSTEM on startup. If this malicious Carousel.Service.exe is configured to launch a reverse shell back to the attacker, then upon reboot the attacker will have a fully privileged remote command-line environment to manipulate the system further.
Weakness: CWE-269
Which versions are affected by CVE-2018-18931?
It affects 1 product.
Products include Trms Carousel Digital Signage.
How do I fix CVE-2018-18931?
No fix has been published for CVE-2018-18931 yet. Limit exposure of the affected software until one is available.
Is CVE-2018-18931 being exploited?
There is no known exploitation of CVE-2018-18931 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-989h-pjm5-xvqg.