CVE-2021-36383 Xen Orchestra Mishandles Authorization
Attackers can modify WebSocket permissions to gain unauthorized access to sensitive VM, backup, and user data in Xen Orchestra.
- 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-2021-36383?
CVE-2021-36383 is a medium-severity missing authorization vulnerability in n/a, published on 12 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Xen Orchestra (with xo-web through 5.80.0 and xo-server through 5.84.0) mishandles authorization, as demonstrated by modified WebSocket resourceSet.getAll data is which the attacker changes the permission field from none to admin. The attacker gains access to data sets such as VMs, Backups, Audit, Users, and Groups.
Which versions are affected by CVE-2021-36383?
4 open source packages ship an affected version, including xo-server and xo-web. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
xo-server npm | All versions to 5.84.0 | None |
xo-server npm | All versions to 5.84.0 | None |
xo-web npm | All versions to 5.80.0 | None |
xo-web npm | All versions to 5.80.0 | None |
Products include Xen-Orchestra Xo-Server, Xen-Orchestra Xo-Web.
How do I fix CVE-2021-36383?
No fix has been published for CVE-2021-36383 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-36383 being exploited?
There is no known exploitation of CVE-2021-36383 in the wild and no public exploit code.
Sources
Also known as GHSA-grvm-gcqf-gh8q.