CVE-2022-4172: Buffer Overflow
First published: Mon Nov 28 2022(Updated: )
An integer overflow and buffer overflow issues were found in the ACPI Error Record Serialization Table (ERST) device of QEMU in the read_erst_record() and write_erst_record() functions. Both issues may allow the guest to overrun the host buffer allocated for the ERST memory device. A malicious guest could use these flaws to crash the QEMU process on the host.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/qemu-kvm | <7.2.0 | 7.2.0 |
| QEMU KVM | =7.0.0 | |
| Fedoraproject Fedora | =37 |
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Reference Links
- https://gitlab.com/qemu-project/qemu/-/commit/defb7098
- https://gitlab.com/qemu-project/qemu/-/issues/1268
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I7J5IRXJYLELW7D43A75LOWRUE5EU54O/
- https://lore.kernel.org/qemu-devel/20221024154233.1043347-1-lk@c--e.de/
- https://security.netapp.com/advisory/ntap-20230127-0013/
- https://www.qemu.org/docs/master/specs/acpi_erst.html
- https://lore.kernel.org/qemu-devel/20221019191522.1004804-1-lk@c--e.de/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2149106
- https://access.redhat.com/errata/RHSA-2023:2162
- https://access.redhat.com/security/cve/cve-2022-4172
- https://bugzilla.redhat.com/show_bug.cgi?id=2149105
- https://lore.kernel.org/qemu-devel/20221024154233.1043347-1-lk%40c--e.de/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7J5IRXJYLELW7D43A75LOWRUE5EU54O/
Frequently Asked Questions
What is CVE-2022-4172?
CVE-2022-4172 is a vulnerability found in the ACPI Error Record Serialization Table (ERST) device of QEMU that allows a malicious guest to overrun the host buffer allocated for the ERST memory device.
What is the severity of CVE-2022-4172?
The severity of CVE-2022-4172 is medium, with a severity value of 6.5.
How does CVE-2022-4172 affect QEMU?
CVE-2022-4172 affects the ACPI Error Record Serialization Table (ERST) device of QEMU in the read_erst_record() and write_erst_record() functions.
Which versions of QEMU are affected by CVE-2022-4172?
QEMU versions up to but exclusive of 7.2.0 are affected by CVE-2022-4172.
Is there a remedy for CVE-2022-4172?
Yes, upgrading to QEMU 7.2.0 or later will fix the vulnerability.
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