Bug 1671930 (CVE-2019-7222)
| Summary: | CVE-2019-7222 Kernel: KVM: leak of uninitialized stack contents to guest | ||
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| Product: | [Other] Security Response | Reporter: | Prasad Pandit <ppandit> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | unspecified | CC: | acaringi, airlied, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jkacur, john.j5live, jonathan, josef, jross, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, pbonzini, plougher, rt-maint, rvrbovsk, security-response-team, steved, williams |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: |
An information leakage issue was found in the way Linux kernel's KVM hypervisor handled page fault exceptions while emulating instructions like VMXON, VMCLEAR, VMPTRLD, and VMWRITE with memory address as an operand. It occurs if the operand is a mmio address, as the returned exception object holds uninitialized stack memory contents. A guest user/process could use this flaw to leak host's stack memory contents to a guest.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2019-08-06 13:21:43 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1671931, 1671932, 1673686, 1673845, 1673846 | ||
| Bug Blocks: | 1671898 | ||
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Description
Prasad Pandit
2019-02-02 07:08:31 UTC
Acknowledgments: Name: Felix Wilhelm (Google) Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1673686] Statement: This issue does not affect the version of the kernel package as shipped with Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG 2. This issue affects the versions of Linux kernel as shipped with Red Hat Enterprise Linux 7. Future kernel updates for Red Hat Enterprise Linux 7 may address this issue. Note:- Impact on Red Hat Enterprise Linux 7 kernel is limited, as it requires that nested virtualization feature is enabled on a system. Nested Virtualization feature is available only as - Technology Preview. This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2019:2029 https://access.redhat.com/errata/RHSA-2019:2029 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2019:2043 https://access.redhat.com/errata/RHSA-2019:2043 This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2019-7222 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2019:3309 https://access.redhat.com/errata/RHSA-2019:3309 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2019:3517 https://access.redhat.com/errata/RHSA-2019:3517 |