Bug 1812659 (CVE-2019-15034)
| Summary: | CVE-2019-15034 qemu: hw/display/bochs-display.c does not ensure a sufficient PCI config space allocation leading to a buffer overflow involving the PCIe extended config space | ||
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| Product: | [Other] Security Response | Reporter: | Guilherme de Almeida Suckevicz <gsuckevi> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED NOTABUG | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | ailan, amit, areis, berrange, cfergeau, dbecker, drjones, dwmw2, imammedo, itamar, jen, jferlan, jforbes, jjoyce, jmaloy, jschluet, kbasil, knoel, lhh, lpeer, m.a.young, mburns, mkenneth, mrezanin, mst, pbonzini, ribarry, rjones, robinlee.sysu, sclewis, slinaber, virt-maint, virt-maint, vkuznets, xen-maint |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | qemu 4.1.0 | Doc Type: | If docs needed, set a value |
| Doc Text: |
A buffer overflow flaw was found in the way the Bochs display driver of QEMU handled the PCIe extended configuration space when the device is connected to a PCIe bus. Accessing the PCIe extended config space could overflow the conventional PCI config space buffer due to limited memory allocation. As the PCIe config space is guest writeable, this flaw allows a local attacker to gain access and potentially execute arbitrary code on the host with the privileges of the QEMU process.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-04-02 22:31:50 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: | |||
| Bug Blocks: | 1810201 | ||
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Description
Guilherme de Almeida Suckevicz
2020-03-11 19:06:49 UTC
Mitigation: Use `-device bochs-display` as conventional PCI device only. Statement: This flaw does not affect the module stream`virt:8.1/qemu-kvm` as shipped with RHEL Advanced Virtualization, as it already includes the patch. Several other packages are unaffected because they do not include PCIe support: * `kvm` and `xen` as shipped with Red Hat Enterprise Linux 5 * `qemu-kvm` as shipped with Red Hat Enterprise Linux 6 and 7 * `qemu-kvm-rhev` as shipped with Red Hat Enterprise Linux 7 * `virt:rhel/qemu-kvm` as shipped with Red Hat Enterprise Linux 8 * `qemu-kvm-rhev` as shipped with Red Hat OpenStack Platform 10 and 13 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-2019-15034 |