CVE-2023-6693

Severity CVSS v4.0:

Pending analysis

Type:

CWE-121 Stack-based Buffer Overflow

Publication date:

02/01/2024

Last modified:

03/11/2025

Description

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS v3.1 Severity and Metrics:

Base Score: 4.90 MEDIUM
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): Low

Base Score 3.x

4.90

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:qemu:qemu::::::::		8.2.1 (excluding)
cpe:2.3:o:redhat:enterprise_linux:8.0::::-:::
cpe:2.3:o:redhat:enterprise_linux:8.0::::advanced_virtualization:::
cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
cpe:2.3:o:fedoraproject:fedora:39:::::::*

To consult the complete list of CPE names with products and versions, see this page

CPE	From	Up to
cpe:2.3:a:qemu:qemu::::::::		8.2.1 (excluding)
cpe:2.3:o:redhat:enterprise_linux:8.0::::-:::
cpe:2.3:o:redhat:enterprise_linux:8.0::::advanced_virtualization:::
cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
cpe:2.3:o:fedoraproject:fedora:39:::::::*

CVE-2023-6693

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools