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TI-2023-03137 Aliases CVE-2023-3354GHSA-vhf9-5f69-9hjm

Improper i/o watch removal in tls handshake can lead to remote unauthenticated denial of service

Priority LOW 36CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 13 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

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.

Why it matters now

EPSS 0.01606 76th percentileScored 2026-11-08
Fix Partial Red Hat: 7 advisoriesRed Hat: 13 fixed, 3 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—qemu——No fix listedCNA
Red HatRed Hat Enterprise Linux 6——Not affectedCNA
Red HatRed Hat Enterprise Linux 7——Not affectedCNA
Red HatRed Hat Enterprise Linux 7——No fix listedCNA
Red HatRed Hat Enterprise Linux 8——No fix listedCNA
Red HatRed Hat Enterprise Linux 8 Advanced Virtualization——No fix listedCNA
Red HatRed Hat Enterprise Linux 9——No fix listedCNA
Red HatRed Hat OpenStack Platform 13 (Queens)——No fix listedCNA
FedoraFedora——No fix listedCNA
FedoraExtra Packages for Enterprise Linux——Not affectedCNA
  • qemu Vendor— Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux 8 Advanced Virtualization VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat OpenStack Platform 13 (Queens) VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Fedora VendorFedora Affected — Fixed in — No fix listed CNA
  • Extra Packages for Enterprise Linux VendorFedora Affected — Fixed in — Not affected CNA

CPE configurations NVD · 9

CPEVersionsRoleVendor
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*before 8.1.0VulnerableQEMU
cpe:2.3:a:qemu:qemu:8.1.0:rc0:*:*:*:*:*:*8.1.0 rc0VulnerableQEMU
cpe:2.3:a:qemu:qemu:8.1.0:rc1:*:*:*:*:*:*8.1.0 rc1VulnerableQEMU
cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:*13.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*8.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*8.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*9.0VulnerableRed Hat
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*38VulnerableFedoraproject
  • cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* Versions before 8.1.0 Vulnerable ·QEMU
  • cpe:2.3:a:qemu:qemu:8.1.0:rc0:*:*:*:*:*:* Versions 8.1.0 rc0 Vulnerable ·QEMU
  • cpe:2.3:a:qemu:qemu:8.1.0:rc1:*:*:*:*:*:* Versions 8.1.0 rc1 Vulnerable ·QEMU
  • cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:* Versions 13.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
  • cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* Versions 38 Vulnerable ·Fedoraproject

Remediation

Red Hat 7 advisories

  • RHSA-2024:0404 Released 2024-01-25 · Red Hat rating Important
    virt:rhel and virt-devel:rhel security update
    • Red Hat CodeReady Linux Builder EUS (v.8.6) SLOF-20210217-1.module+el8.6.0+14480+c0a3aa0f.src::virt-devel:rhel, hivex-1.3.18-23.module+el8.6.0+14480+c0a3aa0f.i686::virt-devel:rhel, hivex-devel-1.3.18-23.module+el8.6.0+14480+c0a3aa0f.i686::virt-devel:rhel +47
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) SLOF-20210217-1.module+el8.6.0+14480+c0a3aa0f.noarch::virt:rhel, SLOF-20210217-1.module+el8.6.0+14480+c0a3aa0f.src::virt:rhel, hivex-1.3.18-23.module+el8.6.0+14480+c0a3aa0f.aarch64::virt:rhel +47
  • RHSA-2023:6227 Released 2023-11-01 · Red Hat rating Important
    qemu-kvm security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) qemu-guest-agent-17:6.2.0-11.el9_0.8, qemu-img-17:6.2.0-11.el9_0.8, qemu-kvm-17:6.2.0-11.el9_0.8 +19
  • RHSA-2023:5796 Released 2023-10-17 · Red Hat rating Important
    virt:rhel security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) hivex-1.3.18-21.module+el8.4.0+10770+19c037f9.src::virt:rhel, hivex-1.3.18-21.module+el8.4.0+10770+19c037f9.x86_64::virt:rhel, hivex-devel-1.3.18-21.module+el8.4.0+10770+19c037f9.x86_64::virt:rhel +47
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) SLOF-20191022-3.git899d9883.module+el8.3.0+6423+e4cb6418.noarch::virt:rhel, SLOF-20191022-3.git899d9883.module+el8.3.0+6423+e4cb6418.src::virt:rhel, hivex-1.3.18-21.module+el8.4.0+10770+19c037f9.aarch64::virt:rhel +47
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) hivex-1.3.18-21.module+el8.4.0+10770+19c037f9.src::virt:rhel, hivex-1.3.18-21.module+el8.4.0+10770+19c037f9.x86_64::virt:rhel, hivex-devel-1.3.18-21.module+el8.4.0+10770+19c037f9.x86_64::virt:rhel +47
Show 4 more Red Hat advisories
  • RHSA-2023:5587 Released 2023-10-10 · Red Hat rating Important
    virt:rhel security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) hivex-1.3.15-7.module+el8.1.0+4066+0f1aadab.src::virt:rhel, hivex-1.3.15-7.module+el8.1.0+4066+0f1aadab.x86_64::virt:rhel, hivex-devel-1.3.15-7.module+el8.1.0+4066+0f1aadab.x86_64::virt:rhel +47
    • Red Hat Enterprise Linux AppStream E4S (v. 8.2) SLOF-20171214-6.gitfa98132.module+el8.1.0+4066+0f1aadab.noarch::virt:rhel, SLOF-20171214-6.gitfa98132.module+el8.1.0+4066+0f1aadab.src::virt:rhel, hivex-1.3.15-7.module+el8.1.0+4066+0f1aadab.ppc64le::virt:rhel +47
    • Red Hat Enterprise Linux AppStream TUS (v. 8.2) hivex-1.3.15-7.module+el8.1.0+4066+0f1aadab.src::virt:rhel, hivex-1.3.15-7.module+el8.1.0+4066+0f1aadab.x86_64::virt:rhel, hivex-devel-1.3.15-7.module+el8.1.0+4066+0f1aadab.x86_64::virt:rhel +47
  • RHSA-2023:5264 Released 2023-09-19 · Red Hat rating Important
    virt:rhel and virt-devel:rhel security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 8) SLOF-20210217-1.module+el8.8.0+16781+9f4724c2.noarch::virt:rhel, SLOF-20210217-1.module+el8.8.0+16781+9f4724c2.src::virt:rhel, hivex-1.3.18-23.module+el8.8.0+16781+9f4724c2.aarch64::virt:rhel +47
    • Red Hat Enterprise Linux CRB (v. 8) SLOF-20210217-1.module+el8.8.0+16781+9f4724c2.src::virt-devel:rhel, hivex-1.3.18-23.module+el8.8.0+16781+9f4724c2.i686::virt-devel:rhel, hivex-devel-1.3.18-23.module+el8.8.0+16781+9f4724c2.i686::virt-devel:rhel +47
  • RHSA-2023:5239 Released 2023-09-19 · Red Hat rating Important
    virt:rhel and virt-devel:rhel security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) SLOF-20171214-6.gitfa98132.module+el8.1.0+4066+0f1aadab.noarch::virt:rhel, SLOF-20171214-6.gitfa98132.module+el8.1.0+4066+0f1aadab.src::virt:rhel, hivex-1.3.15-7.module+el8.1.0+4066+0f1aadab.ppc64le::virt:rhel +47
  • RHSA-2023:5094 Released 2023-09-12 · Red Hat rating Important
    qemu-kvm security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 9) qemu-guest-agent-17:7.2.0-14.el9_2.5, qemu-img-17:7.2.0-14.el9_2.5, qemu-kvm-17:7.2.0-14.el9_2.5 +16

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux 8 Advanced VirtualizationAffectedNo fix yet
Red Hat OpenStack Platform 13 (Queens)AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.8.6)Fixed RHSA-2024:0404
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:5264
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:5094
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2023:5587
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2023:5796
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2023:5239
Red Hat Enterprise Linux AppStream E4S (v. 8.2)Fixed RHSA-2023:5587
Red Hat Enterprise Linux AppStream E4S (v.8.4)Fixed RHSA-2023:5796
Red Hat Enterprise Linux AppStream EUS (v.8.6)Fixed RHSA-2024:0404
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2023:6227
Red Hat Enterprise Linux AppStream TUS (v. 8.2)Fixed RHSA-2023:5587
Red Hat Enterprise Linux AppStream TUS (v.8.4)Fixed RHSA-2023:5796
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2023:5264
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-3354
  2. 2026-10-03 Alias added: GHSA-vhf9-5f69-9hjm

References

Patch 1

Advisory 1

Other 2

  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-10530 Code injection in [UNKNOWN] RichFaces KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-23530 Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf… KEVCVSS 3.1CRITICAL 9.3
  • TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
See all 1955 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences