Allocation of Resources Without Limits or Throttling Affecting qemu-kvm-block-iscsi package, versions <15:4.2.1-11.module+el8.4.0+20319+6eb4347c
Threat Intelligence
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk ID SNYK-ORACLE8-QEMUKVMBLOCKISCSI-2601894
- published 10 Apr 2022
- disclosed 26 May 2021
Introduced: 26 May 2021
CVE-2021-3527 Open this link in a new tabHow to fix?
Upgrade Oracle:8 qemu-kvm-block-iscsi to version 15:4.2.1-11.module+el8.4.0+20319+6eb4347c or higher.
This issue was patched in ELSA-2021-9568.
NVD Description
Note: Versions mentioned in the description apply only to the upstream qemu-kvm-block-iscsi package and not the qemu-kvm-block-iscsi package as distributed by Oracle.
See How to fix? for Oracle:8 relevant fixed versions and status.
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.
References
- https://linux.oracle.com/cve/CVE-2021-3527.html
- https://linux.oracle.com/errata/ELSA-2021-9425.html
- https://www.openwall.com/lists/oss-security/2021/05/05/5
- https://gitlab.com/qemu-project/qemu/-/commit/05a40b172e4d691371534828078be47e7fff524c
- https://bugzilla.redhat.com/show_bug.cgi?id=1955695
- https://gitlab.com/qemu-project/qemu/-/commit/7ec54f9eb62b5d177e30eb8b1cad795a5f8d8986
- 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