CVE-2021-3611: Buffer Overflow
First published: Fri Jun 18 2021(Updated: )
A KVM guest can crash qemu-kvm (likely with a stack overflow) when the guest has been started with the intel-hda device. According to the upstream ticket, the crash is due to a stack overflow. References: <a href="https://bugs.launchpad.net/qemu/+bug/1907497">https://bugs.launchpad.net/qemu/+bug/1907497</a> <a href="https://gitlab.com/qemu-project/qemu/-/issues/542">https://gitlab.com/qemu-project/qemu/-/issues/542</a>
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| QEMU qemu | <7.0.0 | |
| Redhat Enterprise Linux | =8.0 | |
| debian/qemu | <=1:5.2+dfsg-11+deb11u3<=1:5.2+dfsg-11+deb11u2 | 1:7.2+dfsg-7+deb12u7 1:9.0.2+ds-2 1:9.1.0+ds-3 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1973784
- https://gitlab.com/qemu-project/qemu/-/issues/542
- https://security.gentoo.org/glsa/202208-27
- https://security.netapp.com/advisory/ntap-20220624-0001/
- https://bugs.launchpad.net/qemu/+bug/1907497
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1975833
- https://patchew.org/QEMU/20200903110831.353476-1-philmd@redhat.com
- https://mail.gnu.org/archive/html/qemu-devel/2020-09/msg00906.html
- https://gitlab.com/qemu-project/qemu/-/commit/79fa99831debc9782087e834382c577215f2f511
- https://access.redhat.com/errata/RHSA-2022:7967
- https://access.redhat.com/security/cve/cve-2021-3611
- https://launchpad.net/bugs/cve/CVE-2021-3611
- https://git.qemu.org/?p=qemu.git;a=commit;h=a9d8ba2be58e067bdfbff830eb9ff438d8db7f10
- https://lore.kernel.org/qemu-devel/20211218160912.1591633-1-philmd@redhat.com/
- https://security-tracker.debian.org/tracker/CVE-2021-3611
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3611
- https://nvd.nist.gov/vuln/detail/CVE-2021-3611
- https://ubuntu.com/security/CVE-2021-3611
Frequently Asked Questions
What is CVE-2021-3611?
CVE-2021-3611 is a stack overflow vulnerability found in the Intel HD Audio device (intel-hda) of QEMU.
How does CVE-2021-3611 affect QEMU?
The vulnerability allows a malicious guest to crash the QEMU process on the host, resulting in a denial of service.
What is the severity of CVE-2021-3611?
CVE-2021-3611 has a severity rating of 6.5, which is considered medium.
Which software versions are affected by CVE-2021-3611?
QEMU versions up to exclusive 7.0.0 and Redhat Enterprise Linux version 8.0 are affected.
How can CVE-2021-3611 be fixed?
Update QEMU to a version higher than 7.0.0 or apply the necessary patches provided by the vendor.
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