CVE-2015-0239 Privilege escalation in n/a
A local attacker in a guest OS can escalate privileges or crash the system by exploiting a KVM emulation flaw when SYSENTER MSR initialization is missing.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2015-0239?
CVE-2015-0239 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 2 Mar 2015. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The em_sysenter function in arch/x86/kvm/emulate.c in the Linux kernel before 3.18.5, when the guest OS lacks SYSENTER MSR initialization, allows guest OS users to gain guest OS privileges or cause a denial of service (guest OS crash) by triggering use of a 16-bit code segment for emulation of a SYSENTER instruction.
Weakness: CWE-269
Which versions are affected by CVE-2015-0239?
It affects 7 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Oracle Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server and 1 more.
How do I fix CVE-2015-0239?
Apply the vendor's patch.
Is CVE-2015-0239 being exploited?
There is no known exploitation of CVE-2015-0239 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2015-0239, GHSA-h9w7-gg89-fg55, UBUNTU-CVE-2015-0239.