Ivanti Cloud Services Appliance (CSA): file access 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 a path traversal vulnerability that could allow a remote, unauthenticated attacker to access restricted functionality. If CVE-2024-8963 is used in conjunction with CVE-2024-8190, an attacker could bypass admin authentication and execute arbitrary commands on the appliance.

What an attacker can do

This is a file access flaw. It lets an attacker read or write files they should never reach, such as configuration files that hold passwords, or upload a malicious file that the system then runs.

How it is reached

Over the internet or network

Access the attacker needs

No account needed

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 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 of supported solutions, as future vulnerabilities on the 4.6.x version of CSA are unlikely to receive security updates.

Vendor advisories and fixes

• forums.ivanti.comforums.ivanti.com/s/article/Security-Advisory-Ivanti-CSA-4-6-Cloud-Services-Appliance-CVE-

How urgent is it

CISA added this vulnerability to its Known Exploited Vulnerabilities catalogue on September 19, 2024, which means there is reliable evidence of attacks in the wild. US federal agencies must fix it by October 10, 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 99% probability that this flaw will be exploited somewhere in the next 30 days. That is higher than 99.9% of all scored vulnerabilities.

Its CVSS severity score is 9.1 out of 10 (critical), as recorded in the US National Vulnerability Database.

Technical description

Path Traversal in the Ivanti CSA before 4.6 Patch 519 allows a remote unauthenticated attacker to access restricted functionality.