Bug 1720114 (CVE-2019-10166)
| Summary: | CVE-2019-10166 libvirt: virDomainManagedSaveDefineXML API exposed to readonly clients | ||
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| Product: | [Other] Security Response | Reporter: | Doran Moppert <dmoppert> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | agedosier, berrange, clalancette, cperry, dblechte, dfediuck, eblake, eedri, erik-fedora, itamar, jdenemar, jforbes, jsuchane, knoel, laine, libvirt-maint, marcandre.lureau, mgoldboi, michal.skrivanek, pkrempa, rbalakri, richard.poettler, rjones, sbonazzo, security-response-team, sherold, sisharma, ssaha, vbellur, veillard, virt-maint, yturgema |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | libvirt 4.10.1, libvirt 5.4.1 | Doc Type: | If docs needed, set a value |
| Doc Text: |
It was discovered that libvirtd would permit readonly clients to use the virDomainManagedSaveDefineXML() API, which would permit them to modify managed save state files. If a managed save had already been created by a privileged user, a local attacker could modify this file such that libvirtd would execute an arbitrary program when the domain was resumed.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2019-07-12 13:07:40 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: | 1720498, 1720502, 1720507, 1720512, 1720516, 1720520, 1720524, 1720528, 1720530, 1722462, 1722465 | ||
| Bug Blocks: | 1718800 | ||
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Description
Doran Moppert
2019-06-13 07:53:24 UTC
Statement: * This vulnerability requires access to the libvirt socket, normally in /var/run/libvirt/libvirt_sock_ro. Typically in hypervisor environments, local user accounts are not supported so no untrusted users should be able to access this socket. * Red Hat Gluster Storage 3 is not affected by this vulnerability as libvirtd daemon is not shipped in Gluster. External References: https://access.redhat.com/libvirt-privesc-vulnerabilities Mitigation: The Unix permissions of libvirt's read-only socket can be made more restrictive than the default (0777) by editing `/etc/libvirt/libvirtd.conf`. The settings `unix_sock_group = libvirt` and `unix_sock_ro_perms = 0770` will restrict access to only members of `libvirt`, who already have management access to virtual machines. Upstream patch: https://libvirt.org/git/?p=libvirt.git;a=commit;h=db0b78457f183e4c7ac45bc94de86044a1e2056a Created libvirt tracking bugs for this issue: Affects: fedora-all [bug 1722462] Created mingw-libvirt tracking bugs for this issue: Affects: fedora-all [bug 1722465] This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2019:1579 https://access.redhat.com/errata/RHSA-2019:1579 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2019:1580 https://access.redhat.com/errata/RHSA-2019:1580 Acknowledgments: Name: Matthias Gerstner (SUSE) This issue has been addressed in the following products: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 Via RHSA-2019:1699 https://access.redhat.com/errata/RHSA-2019:1699 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Advanced Virtualization Via RHSA-2019:1762 https://access.redhat.com/errata/RHSA-2019:1762 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-2019-10166 |