OracleVM 3.3 : xen (OVMSA-2015-0141)
High Nessus Plugin ID 86669
SynopsisThe remote OracleVM host is missing one or more security updates.
DescriptionThe remote OracleVM system is missing necessary patches to address critical security updates :
- x86: rate-limit logging in do_xen[oprof,pmu]_op Some of the sub-ops are acessible to all guests, and hence should be rate-limited. In the xenoprof case, just like for XSA-146, include them only in debug builds. Since the vPMU code is rather new, allow them to be always present, but downgrade them to (rate limited) guest messages. This is XSA-152. (CVE-2015-7971)
- xenoprof: free domain's vcpu array This was overlooked in fb442e2171 ('x86_64: allow more vCPU-s per guest').
This is XSA-151. (CVE-2015-7969)
- x86: guard against undue super page PTE creation When optional super page support got added (commit bd1cd81d64 'x86: PV support for hugepages'), two adjustments were missed: mod_l2_entry needs to consider the PSE and RW bits when deciding whether to use the fast path, and the PSE bit must not be removed from L2_DISALLOW_MASK unconditionally. This is XSA-148. (CVE-2015-7835)
SolutionUpdate the affected xen / xen-tools packages.