CVE-2023-3354
Improper i/o watch removal in tls handshake can lead to remote unauthenticated denial of service
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.
This update for qemu fixes the following issues. Fixed a memory leak due to a missing virtqueue detach on error. Fixed an use-after-free in nvme DMA reentrancy issue. Fixed a stack overflow due to a DMA reentrancy issue. Fixed a DoS due to an OOB access during mmio operations. Fixed a remote unauthenticated DoS due to an improper I/O watch removal in VNC TLS handshake. Fixed a heap buffer overflow in virtio_crypto_sym_op_helper. Fixed an out-of-bounds write due to an inconsistent check in ati_2d_blt. Fixed an use-after-free in DMA reentrancy issue. Fixed improper access control on special files in 9pfs. Fixed use-after-free issue in pvrdma_exec_cmd. The following non-security bug was fixed. Prepare for binutils update to 2.41 update.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2023-06-21 CVE Reserved
- 2023-07-11 CVE Published
- 2025-02-13 CVE Updated
- 2025-04-15 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-476: NULL Pointer Dereference
CAPEC
References (4)
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2216478 | 2024-01-25 |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2023-3354 | 2024-01-25 |
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" | < 8.1.0 Search vendor "Qemu" for product "Qemu" and version " < 8.1.0" | - |
Affected
| ||||||
| Qemu Search vendor "Qemu" | Qemu Search vendor "Qemu" for product "Qemu" | 8.1.0 Search vendor "Qemu" for product "Qemu" and version "8.1.0" | rc0 |
Affected
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| Qemu Search vendor "Qemu" | Qemu Search vendor "Qemu" for product "Qemu" | 8.1.0 Search vendor "Qemu" for product "Qemu" and version "8.1.0" | rc1 |
Affected
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| Redhat Search vendor "Redhat" | Openstack Platform Search vendor "Redhat" for product "Openstack Platform" | 13.0 Search vendor "Redhat" for product "Openstack Platform" and version "13.0" | - |
Affected
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0" | - |
Affected
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| 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
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| 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
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| 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
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 38 Search vendor "Fedoraproject" for product "Fedora" and version "38" | - |
Affected
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