Bug 1566837 (CVE-2018-1087)
| Summary: | CVE-2018-1087 Kernel: KVM: error in exception handling leads to wrong debug stack value | ||
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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: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | airlied, aquini, bgoncalv, bhu, blc, bmcclain, bskeggs, cao.xufeng, carnil, cperry, crrobins, dblechte, dfediuck, dhoward, dougsland, dvlasenk, eedri, ehamera, esammons, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jbastian, jforbes, jglisse, jkacur, jkastner, john.j5live, jonathan, josef, jross, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, lsurette, lwang, matt, mchehab, mcressma, mgoldboi, mguzik, miabbott, michal.skrivanek, mjg59, mlangsdo, mpatalan, nmurray, pbonzini, plougher, pmatouse, pstehlik, rbarry, rcain, rt-maint, rvrbovsk, sbonazzo, security-response-team, sherold, skozina, slawomir, srevivo, steved, williams, ycui, yjog, ykaul, ykopkova, ylavi, yozone |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | kernel 4.16, kernel 4.16-rc7, kernel 4.17-rc1, kernel 4.17-rc2, kernel 4.17-rc3 | Doc Type: | Bug Fix |
| Doc Text: |
A flaw was found in the way the Linux kernel's KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged KVM guest user could use this flaw to crash the guest or, potentially, escalate their privileges in the guest.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-05-28 13:53:13 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: | 1566842, 1566843, 1566844, 1566845, 1566846, 1566847, 1566848, 1566849, 1566850, 1566851, 1567907, 1576070, 1577045, 1577046, 1577047 | ||
| Bug Blocks: | 1558424 | ||
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Description
Prasad Pandit
2018-04-13 05:54:03 UTC
Acknowledgments: Name: Andy Lutomirski This issue was fixed for Fedora with the 4.16 rebases. Statement: This issue does not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG 2. This issue affects the version of the kernel package as shipped with Red Hat Enterprise Linux 7. Future kernel updates for Red Hat Enterprise Linux 7 may address this issue. This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2018:1318 https://access.redhat.com/errata/RHSA-2018:1318 External References: https://access.redhat.com/security/vulnerabilities/pop_ss This issue has been addressed in the following products: Red Hat Enterprise Linux 7.4 Extended Update Support Via RHSA-2018:1345 https://access.redhat.com/errata/RHSA-2018:1345 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.2 Advanced Update Support Red Hat Enterprise Linux 7.2 Update Services for SAP Solutions Red Hat Enterprise Linux 7.2 Telco Extended Update Support Via RHSA-2018:1347 https://access.redhat.com/errata/RHSA-2018:1347 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.3 Extended Update Support Via RHSA-2018:1348 https://access.redhat.com/errata/RHSA-2018:1348 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2018:1355 https://access.redhat.com/errata/RHSA-2018:1355 This issue has been addressed in the following products: Red Hat Virtualization 4 for RHEL-7 Via RHSA-2018:1524 https://access.redhat.com/errata/RHSA-2018:1524 |