Vulnerability Details : CVE-2023-6693
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.
Vulnerability category: Overflow
Products affected by CVE-2023-6693
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
- cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-6693
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 12 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-6693
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.3
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
1.8
|
3.4
|
NIST | 2024-01-08 |
4.9
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L |
1.4
|
3.4
|
Red Hat, Inc. | 2024-01-02 |
4.9
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L |
N/A
|
N/A
|
RedHat-CVE-2023-6693 | 2024-01-02 |
CWE ids for CVE-2023-6693
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A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).Assigned by: secalert@redhat.com (Secondary)
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The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2023-6693
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OYGUN5HVOXESW7MSNM44E4AE2VNXQB6Y/
[SECURITY] Fedora 39 Update: qemu-8.1.3-3.fc39 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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https://access.redhat.com/security/cve/CVE-2023-6693
CVE-2023-6693- Red Hat Customer PortalThird Party Advisory
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https://access.redhat.com/errata/RHSA-2024:2962
RHSA-2024:2962 - Security Advisory - Red Hat Customer Portal
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https://security.netapp.com/advisory/ntap-20240208-0004/
CVE-2023-6693 QEMU Vulnerability in NetApp Products | NetApp Product SecurityThird Party Advisory
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https://bugzilla.redhat.com/show_bug.cgi?id=2254580
2254580 – (CVE-2023-6693) CVE-2023-6693 QEMU: virtio-net: stack buffer overflow in virtio_net_flush_tx()Issue Tracking;Patch
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