CVE-2021-3713
First published: Tue Aug 17 2021(Updated: )
An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of-bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the host.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| QEMU qemu | <=6.1.0 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 | |
| redhat/qemu | <6.2.0 | 6.2.0 |
| debian/qemu | 1:5.2+dfsg-11+deb11u3 1:5.2+dfsg-11+deb11u2 1:7.2+dfsg-7+deb12u7 1:9.1.1+ds-2 1:9.1.1+ds-4 |
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Reference Links
- https://security-tracker.debian.org/tracker/CVE-2021-3713
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3713
- https://bugzilla.redhat.com/show_bug.cgi?id=1994640
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=992727
- https://lists.debian.org/debian-lts-announce/2021/09/msg00000.html
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
- https://security.gentoo.org/glsa/202208-27
- https://security.netapp.com/advisory/ntap-20210923-0006/
- https://www.debian.org/security/2021/dsa-4980
- https://launchpad.net/bugs/cve/CVE-2021-3713
- https://lists.nongnu.org/archive/html/qemu-devel/2021-08/msg02766.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1994641
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1994644
- https://access.redhat.com/security/cve/cve-2021-3713
- https://gitlab.com/qemu-project/qemu/-/commit/89a453d4a5c195e6d0a3c3d4fcaacb447447115f
- https://gitlab.com/qemu-project/qemu/-/commit/13b250b12ad3c59114a6a17d59caf073ce45b33a
- https://nvd.nist.gov/vuln/detail/CVE-2021-3713
- https://ubuntu.com/security/CVE-2021-3713
Frequently Asked Questions
What is CVE-2021-3713?
CVE-2021-3713 is an out-of-bounds write flaw found in the UAS (USB Attached SCSI) device emulation of QEMU.
What is the severity of CVE-2021-3713?
The severity of CVE-2021-3713 is high (CVSS score 7.4).
Which software versions are affected by CVE-2021-3713?
QEMU versions prior to 6.2.0-rc0 and Debian Linux versions 9.0, 10.0, and 11.0 are affected.
How can this vulnerability be exploited?
This vulnerability can be exploited by a malicious guest using the guest supplied stream number unchecked.
Are there any references for CVE-2021-3713?
Yes, you can find references for CVE-2021-3713 at the following links: [link1](https://security-tracker.debian.org/tracker/CVE-2021-3713), [link2](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3713), [link3](https://bugzilla.redhat.com/show_bug.cgi?id=1994640).
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