CVE-2022-0216: Use After Free
First published: Tue Jan 04 2022(Updated: )
A use after free issue was found in the `hw/scsi/lsi53c895a.c` specifically in `lsi_do_msgout` function. `lsi_do_msgout` function is used to receive message from the OS, and do something based on that message. In this case, one message only has one-byte size.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| QEMU qemu | <6.0.0 | |
| Fedoraproject Fedora | =37 | |
| debian/qemu | <=1:5.2+dfsg-11+deb11u2 | 1:5.2+dfsg-11+deb11u3 1:7.2+dfsg-7+deb12u7 1:9.2.0+ds-2 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2022-0216
- https://bugzilla.redhat.com/show_bug.cgi?id=2036953
- https://gitlab.com/qemu-project/qemu/-/commit/4367a20cc4
- https://gitlab.com/qemu-project/qemu/-/issues/972
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZTY7TVHX62OJWF6IOBCIGLR2N5K4QN3E/
- https://starlabs.sg/advisories/22/22-0216/
- https://launchpad.net/bugs/cve/CVE-2022-0216
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2070900
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2070902
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2070899
- https://starlabs.sg/advisories/22/22-0216
- https://access.redhat.com/security/cve/cve-2022-0216
- https://gitlab.com/qemu-project/qemu/-/commit/6c8fa961da5e60f574bb52fd3ad44b1e9e8ad4b8
- https://gitlab.com/qemu-project/qemu/-/commit/4367a20cc442c56b05611b4224de9a61908f9eac
- https://security-tracker.debian.org/tracker/CVE-2022-0216
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-0216
- https://nvd.nist.gov/vuln/detail/CVE-2022-0216
- https://ubuntu.com/security/CVE-2022-0216
Frequently Asked Questions
What is CVE-2022-0216?
CVE-2022-0216 is a use-after-free vulnerability found in the LSI53C895A SCSI Host Bus Adapter emulation of QEMU.
How does the vulnerability occur?
The vulnerability occurs while processing repeated messages to cancel the current SCSI request via the lsi_do_msgout function.
How can a malicious user exploit this vulnerability?
A malicious privileged user within the guest can exploit this vulnerability to crash the QEMU process.
What is the severity of CVE-2022-0216?
The severity of CVE-2022-0216 is medium, with a severity value of 4.4.
How can I fix the vulnerability?
To fix the vulnerability, update the affected software to the recommended versions: 1:2.11+dfsg-1ubuntu7.41, 1:4.2-3ubuntu6.24, 1:7.0+dfsg-7ubuntu2.1, 2.0.0+dfsg-2ubuntu1.47+, 1:2.5+dfsg-5ubuntu10.51+, 1:6.2+dfsg-2ubuntu6.6 for Ubuntu and 1:3.1+dfsg-8+deb10u11, 1:5.2+dfsg-11+deb11u3, 1:7.2+dfsg-7+deb12u2, 1:8.1.2+ds-1 for Debian.
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