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Vulnerability Details : CVE-2021-3527

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.
Publish Date : 2021-05-26 Last Update Date : 2021-11-15
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- CVSS Scores & Vulnerability Types

CVSS Score
2.1
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 770

- Products Affected By CVE-2021-3527

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
2 Application Qemu Qemu * * * * Version Details Vulnerabilities
3 OS Redhat Enterprise Linux 8.0 * * * Version Details Vulnerabilities
4 OS Redhat Enterprise Linux 8.0 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 1
Qemu Qemu 1
Redhat Enterprise Linux 2

- References For CVE-2021-3527

https://lists.debian.org/debian-lts-announce/2021/09/msg00000.html
MLIST [debian-lts-announce] 20210902 [SECURITY] [DLA 2753-1] qemu security update
https://security.netapp.com/advisory/ntap-20210708-0008/ CONFIRM
https://gitlab.com/qemu-project/qemu/-/commit/7ec54f9eb62b5d177e30eb8b1cad795a5f8d8986
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/05a40b172e4d691371534828078be47e7fff524c

- Metasploit Modules Related To CVE-2021-3527

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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