Vulnerability-Lookup

oesa-2021-1414

Vulnerability from osv_openeuler

Published

2021-11-04 11:04

Modified

2026-08-06 11:04

Summary

freerdp security update

Details

A Remote Desktop Protocol Implementation

Security Fix(es):

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. All FreeRDP clients prior to version 2.4.1 using gateway connections fail to validate input data. A malicious gateway might allow client memory to be written out of bounds. This issue has been resolved in version 2.4.1. If you are unable to update then use /gt:http rather than /gt:rdp connections if possible or use a direct connection without a gateway.(CVE-2021-41159)

Severity

9.1 (Critical)


                    
                      CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-41159	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "freerdp-2.4.1-1.oe1.aarch64.rpm",
          "freerdp-debuginfo-2.4.1-1.oe1.aarch64.rpm",
          "freerdp-debugsource-2.4.1-1.oe1.aarch64.rpm",
          "freerdp-devel-2.4.1-1.oe1.aarch64.rpm",
          "freerdp-help-2.4.1-1.oe1.aarch64.rpm",
          "libwinpr-2.4.1-1.oe1.aarch64.rpm",
          "libwinpr-devel-2.4.1-1.oe1.aarch64.rpm"
        ],
        "src": [
          "freerdp-2.4.1-1.oe1.src.rpm"
        ],
        "x86_64": [
          "freerdp-2.4.1-1.oe1.x86_64.rpm",
          "freerdp-debuginfo-2.4.1-1.oe1.x86_64.rpm",
          "freerdp-debugsource-2.4.1-1.oe1.x86_64.rpm",
          "freerdp-devel-2.4.1-1.oe1.x86_64.rpm",
          "freerdp-help-2.4.1-1.oe1.x86_64.rpm",
          "libwinpr-2.4.1-1.oe1.x86_64.rpm",
          "libwinpr-devel-2.4.1-1.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "freerdp",
        "purl": "pkg:rpm/openEuler/freerdp\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.1-1.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "freerdp-2.4.1-1.oe1.aarch64.rpm",
          "freerdp-debuginfo-2.4.1-1.oe1.aarch64.rpm",
          "freerdp-debugsource-2.4.1-1.oe1.aarch64.rpm",
          "freerdp-devel-2.4.1-1.oe1.aarch64.rpm",
          "freerdp-help-2.4.1-1.oe1.aarch64.rpm",
          "libwinpr-2.4.1-1.oe1.aarch64.rpm",
          "libwinpr-devel-2.4.1-1.oe1.aarch64.rpm"
        ],
        "src": [
          "freerdp-2.4.1-1.oe1.src.rpm"
        ],
        "x86_64": [
          "freerdp-2.4.1-1.oe1.x86_64.rpm",
          "freerdp-debuginfo-2.4.1-1.oe1.x86_64.rpm",
          "freerdp-debugsource-2.4.1-1.oe1.x86_64.rpm",
          "freerdp-devel-2.4.1-1.oe1.x86_64.rpm",
          "freerdp-help-2.4.1-1.oe1.x86_64.rpm",
          "libwinpr-2.4.1-1.oe1.x86_64.rpm",
          "libwinpr-devel-2.4.1-1.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP2",
        "name": "freerdp",
        "purl": "pkg:rpm/openEuler/freerdp\u0026distro=openEuler-20.03-LTS-SP2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.1-1.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Critical"
  },
  "details": "A Remote Desktop Protocol Implementation\r\n\r\nSecurity Fix(es):\r\n\r\nFreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. All FreeRDP clients prior to version 2.4.1 using gateway connections fail to validate input data. A malicious gateway might allow client memory to be written out of bounds. This issue has been resolved in version 2.4.1. If you are unable to update then use /gt:http rather than /gt:rdp connections if possible or use a direct connection without a gateway.(CVE-2021-41159)",
  "id": "OESA-2021-1414",
  "modified": "2026-08-06T11:04:41Z",
  "published": "2021-11-04T11:04:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1414"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41159"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "freerdp security update",
  "upstream": [
    "CVE-2021-41159"
  ]
}

CVE-2021-41159 (GCVE-0-2021-41159)

Vulnerability from cvelistv5 – Published: 2021-10-21 00:00 – Updated: 2024-08-04 02:59

Title

Improper client input validation for FreeRDP gateway connections allows to overwrite memory

Summary

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. All FreeRDP clients prior to version 2.4.1 using gateway connections (`/gt:rpc`) fail to validate input data. A malicious gateway might allow client memory to be written out of bounds. This issue has been resolved in version 2.4.1. If you are unable to update then use `/gt:http` rather than /gt:rdp connections if possible or use a direct connection without a gateway.

Severity

5.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N

CWE

CWE-787 - Out-of-bounds Write

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/FreeRDP/FreeRDP/security/advis…
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://security.gentoo.org/glsa/202210-24	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeRDP	FreeRDP	Affected: < 2.4.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T02:59:31.631Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-vh34-m9h7-95xq"
          },
          {
            "name": "FEDORA-2021-2c25f03d0b",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DWJXQOWKNR7O5HM2HFJOM4GBUFPTE3RG/"
          },
          {
            "name": "GLSA-202210-24",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202210-24"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "FreeRDP",
          "vendor": "FreeRDP",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.4.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. All FreeRDP clients prior to version 2.4.1 using gateway connections (`/gt:rpc`) fail to validate input data. A malicious gateway might allow client memory to be written out of bounds. This issue has been resolved in version 2.4.1. If you are unable to update then use `/gt:http` rather than /gt:rdp connections if possible or use a direct connection without a gateway."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787: Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-10-31T00:00:00.000Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-vh34-m9h7-95xq"
        },
        {
          "name": "FEDORA-2021-2c25f03d0b",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DWJXQOWKNR7O5HM2HFJOM4GBUFPTE3RG/"
        },
        {
          "name": "GLSA-202210-24",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.gentoo.org/glsa/202210-24"
        }
      ],
      "source": {
        "advisory": "GHSA-vh34-m9h7-95xq",
        "discovery": "UNKNOWN"
      },
      "title": "Improper client input validation for FreeRDP gateway connections allows to overwrite memory"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2021-41159",
    "datePublished": "2021-10-21T00:00:00.000Z",
    "dateReserved": "2021-09-15T00:00:00.000Z",
    "dateUpdated": "2024-08-04T02:59:31.631Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.