CVE-2021-3527
N/A
N/A
Summary
A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| n/a | QEMU | all versions | affected |
Weaknesses
- CWE-770: CWE-770
ADP Enrichment
CVE Program Container
Additional References
- https://bugzilla.redhat.com/show_bug.cgi?id=1955695
- https://www.openwall.com/lists/oss-security/2021/05/05/5
- https://gitlab.com/qemu-project/qemu/-/commit/7ec54f9eb62b5d177e30eb8b1cad795a5f8d8986
- https://gitlab.com/qemu-project/qemu/-/commit/05a40b172e4d691371534828078be47e7fff524c
- https://security.netapp.com/advisory/ntap-20210708-0008/
- https://lists.debian.org/debian-lts-announce/2021/09/msg00000.html
- https://security.gentoo.org/glsa/202208-27
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1955695
- https://www.openwall.com/lists/oss-security/2021/05/05/5
- https://gitlab.com/qemu-project/qemu/-/commit/7ec54f9eb62b5d177e30eb8b1cad795a5f8d8986
- https://gitlab.com/qemu-project/qemu/-/commit/05a40b172e4d691371534828078be47e7fff524c
- https://security.netapp.com/advisory/ntap-20210708-0008/
- https://lists.debian.org/debian-lts-announce/2021/09/msg00000.html
- https://security.gentoo.org/glsa/202208-27
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
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