CVE-2021-3527
- State
- Published
- Severity
- Not scored
- Published
- May 26, 2021
- Updated
- Aug 3, 2024
- Reserved
- Apr 30, 2021
Description
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.
Scores
The record has no CVSS score.
Weaknesses
Affected Products
| Product | Versions |
|---|---|
QEMUn/a |
|
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/
- [debian-lts-announce] 20210902 [SECURITY] [DLA 2753-1] qemu security updatemailing-list
- GLSA-202208-27vendor-advisory
- [debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security updatemailing-list
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