CVE-2019-19580 Race condition in n/a
A malicious x86 PV guest administrator can escalate privileges to the host OS via race conditions in pagetable operations.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-19580?
CVE-2019-19580 is a medium-severity vulnerability in Fedoraproject Fedora, published on 11 Dec 2019. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations, because of an incomplete fix for CVE-2019-18421. XSA-299 addressed several critical issues in restartable PV type change operations. Despite extensive testing and auditing, some corner cases were missed. A malicious PV guest administrator may be able to escalate their privilege to that of the host. All security-supported versions of Xen are vulnerable. Only x86 systems are affected. Arm systems are not affected. Only x86 PV guests can leverage the vulnerability. x86 HVM and PVH guests cannot leverage the vulnerability. Note that these attacks require very precise timing, which may be difficult to exploit in practice.
Weakness: CWE-362
Which versions are affected by CVE-2019-19580?
It affects 2 products.
Products include Fedoraproject Fedora, Xen Xen.
How do I fix CVE-2019-19580?
Apply the vendor's patch.
Is CVE-2019-19580 being exploited?
There is no known exploitation of CVE-2019-19580 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as ALPINE-CVE-2019-19580, DEBIAN-CVE-2019-19580, GHSA-5f2h-r2x9-9p3v, UBUNTU-CVE-2019-19580.