CVE-2023-6693

Qemu: virtio-net: stack buffer overflow in virtio_net_flush_tx()

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A stack based buffer overflow was found in the virtio-net device of QEMU. This issue occurs when flushing TX in the virtio_net_flush_tx function if guest features VIRTIO_NET_F_HASH_REPORT, VIRTIO_F_VERSION_1 and VIRTIO_NET_F_MRG_RXBUF are enabled. This could allow a malicious user to overwrite local variables allocated on the stack. Specifically, the `out_sg` variable could be used to read a part of process memory and send it to the wire, causing an information leak.

Se encontró un desbordamiento de búfer en la región stack de la memoria en el dispositivo virtio-net de QEMU. Este problema ocurre al vaciar TX en la función virtio_net_flush_tx si las funciones de invitado VIRTIO_NET_F_HASH_REPORT, VIRTIO_F_VERSION_1 y VIRTIO_NET_F_MRG_RXBUF están habilitadas. Esto podría permitir que un usuario malintencionado sobrescriba las variables locales asignadas en la pila. Específicamente, la variable `out_sg` podría usarse para leer una parte de la memoria del proceso y enviarla al cable, provocando una fuga de información.

*Credits: Red Hat would like to thank Xiao Lei (Zhejiang University) for reporting this issue.

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-12-11 CVE Reserved
2024-01-02 CVE Published
2024-02-08 EPSS Updated
2024-11-15 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-121: Stack-based Buffer Overflow
CWE-787: Out-of-bounds Write

CAPEC

References (5)

URL	Tag	Source
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OYGUN5HVOXESW7MSNM44E4AE2VNXQB6Y	Mailing List
https://security.netapp.com/advisory/ntap-20240208-0004	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=2254580	2024-05-22

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2024:2962	2024-05-22
https://access.redhat.com/security/cve/CVE-2023-6693	2024-05-22

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				< 8.2.1 Search vendor "Qemu" for product "Qemu" and version " < 8.2.1"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"		advanced_virtualization		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				9.0 Search vendor "Redhat" for product "Enterprise Linux" and version "9.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				39 Search vendor "Fedoraproject" for product "Fedora" and version "39"		-		Affected