QEMU: out-of-bounds read in ati_cursor_define() function in hw/display/ati.c leads to DoS
Published Dec 31, 2020
6.5
MEDIUMCVSS 3.1
EPSS 0.33%
Description
In QEMU 4.1.0, an out-of-bounds read flaw was found in the ATI VGA implementation. It occurs in the ati_cursor_define() routine while handling MMIO write operations through the ati_mm_write() callback. A malicious guest could abuse this flaw to crash the QEMU process, resulting in a denial of service.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
kvm
Out of support scope
Red Hat Enterprise Linux 5
xen
Out of support scope
Red Hat Enterprise Linux 6
qemu-kvm
Not affected
Red Hat Enterprise Linux 7
qemu-kvm
Not affected
Red Hat Enterprise Linux 7
qemu-kvm-ma
Not affected
Red Hat Enterprise Linux 7
qemu-kvm-rhev
Not affected
Red Hat Enterprise Linux 8
virt:rhel/qemu-kvm
Not affected
Red Hat Enterprise Linux 8 Advanced Virtualization
virt:8.2/qemu-kvm
Not affected
Red Hat Enterprise Linux 9
qemu-kvm
Not affected
Red Hat OpenStack Platform 10 (Newton)
qemu-kvm-rhev
Not affected
Red Hat OpenStack Platform 13 (Queens)
qemu-kvm-rhev
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kvm | Out of support scope | n/a |
| Red Hat Enterprise Linux 5 | xen | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm-ma | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm-rhev | Not affected | n/a |
| Red Hat Enterprise Linux 8 | virt:rhel/qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 8 Advanced Virtualization | virt:8.2/qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 9 | qemu-kvm | Not affected | n/a |
| Red Hat OpenStack Platform 10 (Newton) | qemu-kvm-rhev | Not affected | n/a |
| Red Hat OpenStack Platform 13 (Queens) | qemu-kvm-rhev | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This flaw did not affect the following versions of QEMU as they did not include support for ATI VGA emulation: * `qemu-kvm-ma` as shipped with Red Hat Enterprise Linux 7. * `qemu-kvm-rhev` as shipped with Red Hat Virtualization and Red Hat OpenStack. * `qemu-kvm` as shipped with Red Hat Enterprise Linux 6, 7 and 8. * `virt:8.2/qemu-kvm` as shipped with RHEL Advanced Virtualization. ATI VGA emulation feature was introduced in QEMU upstream version 4.0.0.
References (7)
- https://access.redhat.com/security/cve/CVE-2019-20808 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1841136 x_refsource_MISCIssue TrackingThird Party Advisory
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-11345 Advisory
- https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=aab0e2a661b2b6bf7915c0aefe807fb60d6d9d13 x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2019-20808
- https://security.netapp.com/advisory/ntap-20210205-0003/ x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-20808
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2019-20808 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1841136 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-11345 | Advisory | |
| https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=aab0e2a661b2b6bf7915c0aefe807fb60d6d9d13 | x_refsource_MISC | |
| https://nvd.nist.gov/vuln/detail/CVE-2019-20808 | ||
| https://security.netapp.com/advisory/ntap-20210205-0003/ | x_refsource_CONFIRMThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2019-20808 |
Change history (0)
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