CVE-2015-8555 Information disclosure in n/a
Local guest domains can read sensitive information from other domains due to uninitialized FPU and XMM registers in Xen hypervisor.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2015-8555?
CVE-2015-8555 is a high-severity vulnerability in Citrix Xenserver, published on 13 Apr 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Xen 4.6.x, 4.5.x, 4.4.x, 4.3.x, and earlier do not initialize x86 FPU stack and XMM registers when XSAVE/XRSTOR are not used to manage guest extended register state, which allows local guest domains to obtain sensitive information from other domains via unspecified vectors.
Weakness: CWE-200
Which versions are affected by CVE-2015-8555?
It affects 2 products.
Products include Citrix Xenserver, Xen Xen.
How do I fix CVE-2015-8555?
Apply the vendor's patch.
Is CVE-2015-8555 being exploited?
There is no known exploitation of CVE-2015-8555 in the wild and no public exploit code.
Other vulnerabilities in Citrix Xenserver
Sources
Also known as DEBIAN-CVE-2015-8555, GHSA-ffhp-28g8-p5m9, UBUNTU-CVE-2015-8555.