USN-2365-1

Nicolas Ruff discovered that LibVNCServer incorrectly handled memory when being advertised large screen sizes by the server. If a user were tricked into connecting to a malicious server, an attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. (CVE-2014-6051, CVE-2014-6052)

Nicolas Ruff discovered that LibVNCServer incorrectly handled large ClientCutText messages. A remote attacker could use this issue to cause a server to crash, resulting in a denial of service. (CVE-2014-6053)

Nicolas Ruff discovered that LibVNCServer incorrectly handled zero scaling factor values. A remote attacker could use this issue to cause a server to crash, resulting in a denial of service. (CVE-2014-6054)

Nicolas Ruff discovered that LibVNCServer incorrectly handled memory in the file transfer feature. A remote attacker could use this issue to cause a server to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2014-6055)

References

Affected packages

Ubuntu:14.04:LTS / libvncserver

Package

Name: libvncserver
Purl: pkg:deb/ubuntu/libvncserver@0.9.9+dfsg-1ubuntu1.1?arch=source&distro=trusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.9.9+dfsg-1ubuntu1.1

Affected versions

0.*

0.9.9+dfsg-1

0.9.9+dfsg-1ubuntu1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "0.9.9+dfsg-1ubuntu1.1",
            "binary_name": "libvncserver-config"
        },
        {
            "binary_version": "0.9.9+dfsg-1ubuntu1.1",
            "binary_name": "libvncserver-dev"
        },
        {
            "binary_version": "0.9.9+dfsg-1ubuntu1.1",
            "binary_name": "libvncserver0"
        },
        {
            "binary_version": "0.9.9+dfsg-1ubuntu1.1",
            "binary_name": "linuxvnc"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "cves": [
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2014-6051"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2014-6052"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2014-6053"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2014-6054"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2014-6055"
        }
    ],
    "ecosystem": "Ubuntu:14.04:LTS"
}