UBUNTU-CVE-2026-33689 (CVE-2026-33689)

Vulnerability from osv_ubuntu – Published: 2026-04-17 21:16 – Updated: 2026-06-25 17:14 – Source website
VLAI
Details

xrdp is an open source RDP server. Versions through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafted sequence of packets during the initial connection phase. This vulnerability results from insufficient validation of input buffer lengths before processing dynamic channel communication. Successful exploitation can lead to a denial-of-service (DoS) condition via a process crash or potential disclosure of sensitive information from the service's memory space. This issue has been fixed in version 0.10.6.

Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "xrdp",
            "binary_version": "0.6.0-1ubuntu0.1+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "xrdp",
        "purl": "pkg:deb/ubuntu/xrdp@0.6.0-1ubuntu0.1+esm3?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.6.0-1",
        "0.6.0-1ubuntu0.1",
        "0.6.0-1ubuntu0.1+esm1",
        "0.6.0-1ubuntu0.1+esm2",
        "0.6.0-1ubuntu0.1+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "xrdp",
            "binary_version": "0.6.1-2ubuntu0.3+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "xrdp",
        "purl": "pkg:deb/ubuntu/xrdp@0.6.1-2ubuntu0.3+esm3?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.6.1-2",
        "0.6.1-2ubuntu0.1",
        "0.6.1-2ubuntu0.3",
        "0.6.1-2ubuntu0.3+esm1",
        "0.6.1-2ubuntu0.3+esm2",
        "0.6.1-2ubuntu0.3+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "xorgxrdp",
            "binary_version": "0.9.5-2ubuntu0.1~esm3"
          },
          {
            "binary_name": "xrdp",
            "binary_version": "0.9.5-2ubuntu0.1~esm3"
          },
          {
            "binary_name": "xrdp-pulseaudio-installer",
            "binary_version": "0.9.5-2ubuntu0.1~esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "xrdp",
        "purl": "pkg:deb/ubuntu/xrdp@0.9.5-2ubuntu0.1~esm3?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.1-9",
        "0.9.4-1",
        "0.9.4-2",
        "0.9.4-3",
        "0.9.4-4",
        "0.9.4-5",
        "0.9.5-1",
        "0.9.5-1build1",
        "0.9.5-2",
        "0.9.5-2ubuntu0.1~esm1",
        "0.9.5-2ubuntu0.1~esm2",
        "0.9.5-2ubuntu0.1~esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "xrdp",
            "binary_version": "0.9.12-1ubuntu0.1+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "xrdp",
        "purl": "pkg:deb/ubuntu/xrdp@0.9.12-1ubuntu0.1+esm2?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.9-1",
        "0.9.12-1",
        "0.9.12-1ubuntu0.1",
        "0.9.12-1ubuntu0.1+esm1",
        "0.9.12-1ubuntu0.1+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "xrdp",
            "binary_version": "0.9.17-2ubuntu3+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "xrdp",
        "purl": "pkg:deb/ubuntu/xrdp@0.9.17-2ubuntu3+esm2?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.15-1ubuntu1",
        "0.9.17-1",
        "0.9.17-2",
        "0.9.17-2ubuntu1",
        "0.9.17-2ubuntu2",
        "0.9.17-2ubuntu2+esm1",
        "0.9.17-2ubuntu3",
        "0.9.17-2ubuntu3+esm1",
        "0.9.17-2ubuntu3+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "xrdp",
            "binary_version": "0.9.24-4ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "xrdp",
        "purl": "pkg:deb/ubuntu/xrdp@0.9.24-4ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.21.1-1",
        "0.9.24-2",
        "0.9.24-3",
        "0.9.24-3build1",
        "0.9.24-3build2",
        "0.9.24-4",
        "0.9.24-4ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "xrdp",
            "binary_version": "0.10.1-3.1+deb13u1build0.25.10.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "xrdp",
        "purl": "pkg:deb/ubuntu/xrdp@0.10.1-3.1+deb13u1build0.25.10.1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.1-3",
        "0.10.1-3.1",
        "0.10.1-3.1+deb13u1build0.25.10.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "xrdp",
            "binary_version": "0.10.1-4.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "xrdp",
        "purl": "pkg:deb/ubuntu/xrdp@0.10.1-4.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.1-3.1",
        "0.10.1-4",
        "0.10.1-4.1"
      ]
    }
  ],
  "aliases": [],
  "details": "xrdp is an open source RDP server. Versions through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafted sequence of packets during the initial connection phase. This vulnerability results from insufficient validation of input buffer lengths before processing dynamic channel communication. Successful exploitation can lead to a denial-of-service (DoS) condition via a process crash or potential disclosure of sensitive information from the service\u0027s memory space. This issue has been fixed in version 0.10.6.",
  "id": "UBUNTU-CVE-2026-33689",
  "modified": "2026-06-25T17:14:47Z",
  "published": "2026-04-17T21:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-33689"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-33689"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-92mr-6wpp-27jj"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-33689"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.