UBUNTU-CVE-2023-3255

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Source
https://ubuntu.com/security/CVE-2023-3255
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-3255.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2023-3255
Upstream
Downstream
Related
Published
2023-09-13T17:15:00Z
Modified
2025-09-08T16:55:46Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. A wrong exit condition may lead to an infinite loop when inflating an attacker controlled zlib buffer in the inflate_buffer function. This could allow a remote authenticated client who is able to send a clipboard to the VNC server to trigger a denial of service.

References

Affected packages

Ubuntu:22.04:LTS / qemu

Package

Name
qemu
Purl
pkg:deb/ubuntu/qemu@1:6.2+dfsg-2ubuntu6.16?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:6.2+dfsg-2ubuntu6.16

Affected versions

1:6.*

1:6.0+dfsg-2expubuntu1
1:6.0+dfsg-2expubuntu2
1:6.0+dfsg-2expubuntu4
1:6.2+dfsg-2ubuntu5
1:6.2+dfsg-2ubuntu6
1:6.2+dfsg-2ubuntu6.1
1:6.2+dfsg-2ubuntu6.2
1:6.2+dfsg-2ubuntu6.3
1:6.2+dfsg-2ubuntu6.4
1:6.2+dfsg-2ubuntu6.5
1:6.2+dfsg-2ubuntu6.6
1:6.2+dfsg-2ubuntu6.7
1:6.2+dfsg-2ubuntu6.8
1:6.2+dfsg-2ubuntu6.9
1:6.2+dfsg-2ubuntu6.10
1:6.2+dfsg-2ubuntu6.11
1:6.2+dfsg-2ubuntu6.12
1:6.2+dfsg-2ubuntu6.13
1:6.2+dfsg-2ubuntu6.14
1:6.2+dfsg-2ubuntu6.15

Ecosystem specific 

{
    "priority_reason": "This can only be used as a DoS by an authenticated user to the VNC service.",
    "binaries": [
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-block-extra"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-guest-agent"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-system"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-system-arm"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-system-common"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-system-data"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-system-gui"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-system-mips"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-system-misc"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-system-ppc"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-system-s390x"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-system-sparc"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-system-x86"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-system-x86-microvm"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-system-x86-xen"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-user"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-user-binfmt"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-user-static"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu6.16",
            "binary_name": "qemu-utils"
        }
    ],
    "availability": "No subscription required"
}