a11c33863f
5281fad4-numa-sched-leave-node-affinity-alone-if-not-in-auto-mode.patch 52820823-nested-SVM-adjust-guest-handling-of-structure-mappings.patch 52820863-VMX-don-t-crash-processing-d-debug-key.patch 5282492f-x86-eliminate-has_arch_mmios.patch 52864df2-credit-Update-other-parameters-when-setting-tslice_ms.patch 52864f30-fix-leaking-of-v-cpu_affinity_saved-on-domain-destruction.patch 5289d225-nested-VMX-don-t-ignore-mapping-errors.patch 528a0eb0-x86-consider-modules-when-cutting-off-memory.patch 528f606c-x86-hvm-reset-TSC-to-0-after-domain-resume-from-S3.patch 528f609c-x86-crash-disable-the-watchdog-NMIs-on-the-crashing-cpu.patch 52932418-x86-xsave-fix-nonlazy-state-handling.patch - Add missing requires to pciutils package for xend-tools - bnc#851749 - Xen service file does not call xend properly xend.service - bnc#851386 - VUL-0: xen: XSA-78: Insufficient TLB flushing in VT-d (iommu) code 528a0e5b-TLB-flushing-in-dma_pte_clear_one.patch - bnc#849667 - VUL-0: xen: XSA-74: Lock order reversal between page_alloc_lock and mm_rwlock CVE-2013-4553-xsa74.patch - bnc#849665 - VUL-0: CVE-2013-4551: xen: XSA-75: Host crash due to guest VMX instruction execution 52809208-nested-VMX-VMLANUCH-VMRESUME-emulation-must-check-permission-1st.patch - bnc#849668 - VUL-0: xen: XSA-76: Hypercalls exposed to privilege rings 1 and 2 of HVM guests OBS-URL: https://build.opensuse.org/package/show/Virtualization/xen?expand=0&rev=279
23 lines
650 B
Diff
23 lines
650 B
Diff
References: bnc#849668 CVE-2013-4554 XSA-76
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x86/HVM: only allow ring 0 guest code to make hypercalls
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Anything else would allow for privilege escalation.
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This is CVE-2013-4554 / XSA-76.
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Signed-off-by: Jan Beulich <jbeulich@suse.com>
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Acked-by: Ian Campbell <ian.campbell@citrix.com>
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--- a/xen/arch/x86/hvm/hvm.c
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+++ b/xen/arch/x86/hvm/hvm.c
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@@ -3345,7 +3345,7 @@ int hvm_do_hypercall(struct cpu_user_reg
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case 4:
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case 2:
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hvm_get_segment_register(curr, x86_seg_ss, &sreg);
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- if ( unlikely(sreg.attr.fields.dpl == 3) )
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+ if ( unlikely(sreg.attr.fields.dpl) )
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{
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default:
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regs->eax = -EPERM;
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