Vulnerability-Lookup

OESA-2021-1008 (CVE-2020-11526)

Vulnerability from osv_openeuler – Published: 2021-02-04 11:04 – Updated: 2026-08-06 11:04 – Source website

Summary

freerdp security update

Details

FreeRDP is a client implementation of the Remote Desktop Protocol (RDP) that follows Microsoft's open specifications. This package provides the client applications xfreerdp and wlfreerdp.\r\n\r\n Security Fix(es):\r\n\r\n libfreerdp/core/update.c in FreeRDP versions > 1.1 through 2.0.0-rc4 has an Out-of-bounds Read.(CVE-2020-11526)\r\n\r\n In FreeRDP greater than 1.2 and before 2.0.0, a double free in update_read_cache_bitmap_v3_order crashes the client application if corrupted data from a manipulated server is parsed. This has been patched in 2.0.0.(CVE-2020-11044)\r\n\r\n In FreeRDP greater than 1.1 and before 2.0.0, there is an out-of-bounds read in update_read_icon_info. It allows reading a attacker-defined amount of client memory (32bit unsigned -> 4GB) to an intermediate buffer. This can be used to crash the client or store information for later retrieval. This has been patched in 2.0.0.(CVE-2020-11042)\r\n\r\n In FreeRDP before version 2.1.2, an out of bound reads occurs resulting in accessing a memory location that is outside of the boundaries of the static array PRIMARY_DRAWING_ORDER_FIELD_BYTES. This is fixed in version 2.1.2.(CVE-2020-11095)\r\n\r\n In FreeRDP after 1.0 and before 2.0.0, there is an out-of-bound read in in update_read_bitmap_data that allows client memory to be read to an image buffer. The result displayed on screen as colour.(CVE-2020-11045)\r\n\r\n libfreerdp/gdi/gdi.c in FreeRDP > 1.0 through 2.0.0-rc4 has an Out-of-bounds Read.(CVE-2020-11522)\r\n\r\n libfreerdp/codec/interleaved.c in FreeRDP versions > 1.0 through 2.0.0-rc4 has an Out-of-bounds Write.(CVE-2020-11524)\r\n\r\n libfreerdp/codec/planar.c in FreeRDP version > 1.0 through 2.0.0-rc4 has an Out-of-bounds Write.(CVE-2020-11521)\r\n\r\n libfreerdp/cache/bitmap.c in FreeRDP versions > 1.0 through 2.0.0-rc4 has an Out of bounds read.(CVE-2020-11525)\r\n\r\n libfreerdp/codec/planar.c in FreeRDP version > 1.0 through 2.0.0-rc4 has an Out-of-bounds Write.(CVE-2020-11521)\r\n\r\n libfreerdp/codec/region.c in FreeRDP through 1.1.x and 2.x through 2.0.0-rc4 has memory leaks because a supplied realloc pointer (i.e., the first argument to realloc) is also used for a realloc return value.(CVE-2019-17177)\r\n\r\n

Severity

7.5 (High)


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

References

URL

Type

	https://openeuler.org/en/security/safety-bulletin…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-11526	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-11044	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-11042	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-11095	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-11045	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-11522	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-11524	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-11521	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-11525	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-11523	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2019-17177	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "freerdp-debugsource-2.2.0-2.oe1.aarch64.rpm",
          "libwinpr-2.2.0-2.oe1.aarch64.rpm",
          "freerdp-help-2.2.0-2.oe1.aarch64.rpm",
          "freerdp-debuginfo-2.2.0-2.oe1.aarch64.rpm",
          "libwinpr-devel-2.2.0-2.oe1.aarch64.rpm",
          "freerdp-2.2.0-2.oe1.aarch64.rpm",
          "freerdp-devel-2.2.0-2.oe1.aarch64.rpm",
          "freerdp-debugsource-2.2.0-2.oe1.aarch64.rpm",
          "libwinpr-2.2.0-2.oe1.aarch64.rpm",
          "freerdp-help-2.2.0-2.oe1.aarch64.rpm",
          "freerdp-debuginfo-2.2.0-2.oe1.aarch64.rpm",
          "libwinpr-devel-2.2.0-2.oe1.aarch64.rpm",
          "freerdp-2.2.0-2.oe1.aarch64.rpm",
          "freerdp-devel-2.2.0-2.oe1.aarch64.rpm"
        ],
        "src": [
          "freerdp-2.2.0-2.oe1.src.rpm",
          "freerdp-2.2.0-2.oe1.src.rpm"
        ],
        "x86_64": [
          "libwinpr-2.2.0-2.oe1.x86_64.rpm",
          "libwinpr-devel-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-devel-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-help-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-debuginfo-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-debugsource-2.2.0-2.oe1.x86_64.rpm",
          "libwinpr-2.2.0-2.oe1.x86_64.rpm",
          "libwinpr-devel-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-devel-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-help-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-debuginfo-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-debugsource-2.2.0-2.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS",
        "name": "freerdp",
        "purl": "pkg:rpm/openEuler/freerdp\u0026distro=openEuler-20.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.0-2.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "freerdp-debugsource-2.2.0-2.oe1.aarch64.rpm",
          "libwinpr-2.2.0-2.oe1.aarch64.rpm",
          "freerdp-help-2.2.0-2.oe1.aarch64.rpm",
          "freerdp-debuginfo-2.2.0-2.oe1.aarch64.rpm",
          "libwinpr-devel-2.2.0-2.oe1.aarch64.rpm",
          "freerdp-2.2.0-2.oe1.aarch64.rpm",
          "freerdp-devel-2.2.0-2.oe1.aarch64.rpm"
        ],
        "src": [
          "freerdp-2.2.0-2.oe1.src.rpm"
        ],
        "x86_64": [
          "libwinpr-2.2.0-2.oe1.x86_64.rpm",
          "libwinpr-devel-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-devel-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-help-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-debuginfo-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-2.2.0-2.oe1.x86_64.rpm",
          "freerdp-debugsource-2.2.0-2.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": "2.2.0-2.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "FreeRDP is a client implementation of the Remote Desktop Protocol (RDP) that follows Microsoft\u0027s open specifications. This package provides the client applications xfreerdp and wlfreerdp.\\r\\n\\r\\n\r\nSecurity Fix(es):\\r\\n\\r\\n\r\nlibfreerdp/core/update.c in FreeRDP versions \u003e 1.1 through 2.0.0-rc4 has an Out-of-bounds Read.(CVE-2020-11526)\\r\\n\\r\\n\r\nIn FreeRDP greater than 1.2 and before 2.0.0, a double free in update_read_cache_bitmap_v3_order crashes the client application if corrupted data from a manipulated server is parsed. This has been patched in 2.0.0.(CVE-2020-11044)\\r\\n\\r\\n\r\nIn FreeRDP greater than 1.1 and before 2.0.0, there is an out-of-bounds read in update_read_icon_info. It allows reading a attacker-defined amount of client memory (32bit unsigned -\u003e 4GB) to an intermediate buffer. This can be used to crash the client or store information for later retrieval. This has been patched in 2.0.0.(CVE-2020-11042)\\r\\n\\r\\n\r\nIn FreeRDP before version 2.1.2, an out of bound reads occurs resulting in accessing a memory location that is outside of the boundaries of the static array PRIMARY_DRAWING_ORDER_FIELD_BYTES. This is fixed in version 2.1.2.(CVE-2020-11095)\\r\\n\\r\\n\r\nIn FreeRDP after 1.0 and before 2.0.0, there is an out-of-bound read in in update_read_bitmap_data that allows client memory to be read to an image buffer. The result displayed on screen as colour.(CVE-2020-11045)\\r\\n\\r\\n\nlibfreerdp/gdi/gdi.c in FreeRDP \u003e 1.0 through 2.0.0-rc4 has an Out-of-bounds Read.(CVE-2020-11522)\\r\\n\\r\\n\nlibfreerdp/codec/interleaved.c in FreeRDP versions \u003e 1.0 through 2.0.0-rc4 has an Out-of-bounds Write.(CVE-2020-11524)\\r\\n\\r\\n\nlibfreerdp/codec/planar.c in FreeRDP version \u003e 1.0 through 2.0.0-rc4 has an Out-of-bounds Write.(CVE-2020-11521)\\r\\n\\r\\n\nlibfreerdp/cache/bitmap.c in FreeRDP versions \u003e 1.0 through 2.0.0-rc4 has an Out of bounds read.(CVE-2020-11525)\\r\\n\\r\\n\nlibfreerdp/codec/planar.c in FreeRDP version \u003e 1.0 through 2.0.0-rc4 has an Out-of-bounds Write.(CVE-2020-11521)\\r\\n\\r\\n\nlibfreerdp/codec/region.c in FreeRDP through 1.1.x and 2.x through 2.0.0-rc4 has memory leaks because a supplied realloc pointer (i.e., the first argument to realloc) is also used for a realloc return value.(CVE-2019-17177)\\r\\n\\r\\n",
  "id": "OESA-2021-1008",
  "modified": "2026-08-06T11:04:14Z",
  "published": "2021-02-04T11:04:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1008"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-11526"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-11044"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-11042"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-11095"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-11045"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-11522"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-11524"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-11521"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-11525"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-11523"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-17177"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "freerdp security update",
  "upstream": [
    "CVE-2020-11526",
    "CVE-2020-11044",
    "CVE-2020-11042",
    "CVE-2020-11095",
    "CVE-2020-11045",
    "CVE-2020-11522",
    "CVE-2020-11524",
    "CVE-2020-11523",
    "CVE-2020-11525",
    "CVE-2020-11521",
    "CVE-2019-17177"
  ]
}

CVE-2020-11526 (GCVE-0-2020-11526)

Vulnerability from cvelistv5 – Published: 2020-05-15 16:18 – Updated: 2024-08-04 11:35

Summary

libfreerdp/core/update.c in FreeRDP versions > 1.1 through 2.0.0-rc4 has an Out-of-bounds Read.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

7 references

URL	Tags
https://github.com/FreeRDP/FreeRDP/commits/master	x_refsource_MISC
https://github.com/FreeRDP/FreeRDP/security/advis…	x_refsource_CONFIRM
https://pub.freerdp.com/cve/CVE-2020-11526/pocAna…	x_refsource_CONFIRM
https://usn.ubuntu.com/4379-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4382-1/	vendor-advisoryx_refsource_UBUNTU
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T11:35:12.877Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/FreeRDP/FreeRDP/commits/master"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-97jw-m5w5-xvf9"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://pub.freerdp.com/cve/CVE-2020-11526/pocAnalysis_4.pdf"
          },
          {
            "name": "USN-4379-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/4379-1/"
          },
          {
            "name": "USN-4382-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/4382-1/"
          },
          {
            "name": "openSUSE-SU-2020:1090",
            "tags": [
              "vendor-advisory",
              "x_refsource_SUSE",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.html"
          },
          {
            "name": "[debian-lts-announce] 20200829 [SECURITY] [DLA 2356-1] freerdp security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2020/08/msg00054.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "libfreerdp/core/update.c in FreeRDP versions \u003e 1.1 through 2.0.0-rc4 has an Out-of-bounds Read."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2020-08-30T01:06:13.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
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          ],
          "url": "https://github.com/FreeRDP/FreeRDP/commits/master"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-97jw-m5w5-xvf9"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://pub.freerdp.com/cve/CVE-2020-11526/pocAnalysis_4.pdf"
        },
        {
          "name": "USN-4379-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/4379-1/"
        },
        {
          "name": "USN-4382-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/4382-1/"
        },
        {
          "name": "openSUSE-SU-2020:1090",
          "tags": [
            "vendor-advisory",
            "x_refsource_SUSE"
          ],
          "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.html"
        },
        {
          "name": "[debian-lts-announce] 20200829 [SECURITY] [DLA 2356-1] freerdp security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2020/08/msg00054.html"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-11526",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
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          }
        },
        "data_format": "MITRE",
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        "data_version": "4.0",
        "description": {
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            {
              "lang": "eng",
              "value": "libfreerdp/core/update.c in FreeRDP versions \u003e 1.1 through 2.0.0-rc4 has an Out-of-bounds Read."
            }
          ]
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        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/FreeRDP/FreeRDP/commits/master",
              "refsource": "MISC",
              "url": "https://github.com/FreeRDP/FreeRDP/commits/master"
            },
            {
              "name": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-97jw-m5w5-xvf9",
              "refsource": "CONFIRM",
              "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-97jw-m5w5-xvf9"
            },
            {
              "name": "https://pub.freerdp.com/cve/CVE-2020-11526/pocAnalysis_4.pdf",
              "refsource": "CONFIRM",
              "url": "https://pub.freerdp.com/cve/CVE-2020-11526/pocAnalysis_4.pdf"
            },
            {
              "name": "USN-4379-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4379-1/"
            },
            {
              "name": "USN-4382-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4382-1/"
            },
            {
              "name": "openSUSE-SU-2020:1090",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.html"
            },
            {
              "name": "[debian-lts-announce] 20200829 [SECURITY] [DLA 2356-1] freerdp security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2020/08/msg00054.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2020-11526",
    "datePublished": "2020-05-15T16:18:18.000Z",
    "dateReserved": "2020-04-04T00:00:00.000Z",
    "dateUpdated": "2024-08-04T11:35:12.877Z",
    "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.