Ivanti Cloud Services Appliance (CSA): code execution flaw under attack

What is affected

Ivanti Cloud Services Appliance (CSA) is mostly run by companies, schools and public bodies, not on home computers. You are unlikely to have it yourself, but organisations that hold your data may. Breaches that start with flaws like this one are how personal data ends up leaked.

Ivanti Cloud Services Appliance (CSA) contains an OS command injection vulnerability in the administrative console which can allow an authenticated attacker with application admin privileges to pass commands to the underlying OS.

What an attacker can do

This is a code execution flaw. It lets an attacker run their own commands or programs on the affected system. In practice that usually means taking it over: installing malware, stealing data or using it to reach other devices on the same network.

How it is reached

Over the internet or network

Access the attacker needs

An administrator account

Does the victim have to do something?

No, works without the victim doing anything

What to do

1. At home: nothing to install. Keep your own devices updated and use a different password for every service, so that a breach at one organisation does not open your other accounts.
2. If you administer Ivanti Cloud Services Appliance (CSA) at work: apply the vendor's fix or mitigation now and review logs for signs of compromise, because the flaw was being exploited before it was listed.
3. If the product is past its support date and no fix exists, take it off the internet or retire it.

As Ivanti CSA 4.6.x has reached End-of-Life status, users are urged to remove CSA 4.6.x from service or upgrade to the 5.0.x line, or later, of supported solution.

Vendor advisories and fixes

• forums.ivanti.comforums.ivanti.com/s/article/Security-Advisory-Ivanti-CSA-Cloud-Services-Appliance-CVE-2024

How urgent is it

CISA added this vulnerability to its Known Exploited Vulnerabilities catalogue on October 9, 2024, which means there is reliable evidence of attacks in the wild. US federal agencies must fix it by October 30, 2024, a deadline that has already passed. That deadline does not bind anyone else, but it shows how seriously the agency rates it.

The EPSS model estimates a 60% probability that this flaw will be exploited somewhere in the next 30 days. That is higher than 99.1% of all scored vulnerabilities.

Its CVSS severity score is 7.2 out of 10 (high), as recorded in the US National Vulnerability Database.

Technical description

An OS command injection vulnerability in the admin web console of Ivanti CSA before version 5.0.2 allows a remote authenticated attacker with admin privileges to obtain remote code execution.