Vulnerability-Lookup

CNVD-2021-101167

Vulnerability from cnvd - Published: 2021-12-21

Title

Mozilla Firefox访问控制错误漏洞（CNVD-2021-101167）

Description

Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox存在访问控制错误漏洞，该漏洞源于HTTP2 (RFC 8164) 的机会加密功能允许将连接透明地升级到TLS，同时保留 HTTP 连接的视觉属性，包括与端口 80 上的未加密连接同源。相同的 IP 地址（例如端口 8443）未能选择加入机会加密；网络攻击者可以将浏览器到 443 端口的连接转发到 8443 端口，从而导致浏览器将 8443 端口的内容视为与 HTTP 同源。这是通过禁用使用率较低的机会加密功能解决的。目前没有详细的漏洞细节提供。

Severity

中

Patch Name

Mozilla Firefox访问控制错误漏洞（CNVD-2021-101167）的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://www.mozilla.org/en-US/security/advisories/mfsa2021-48/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-38507

Impacted products

Name
['Mozilla Firefox <94.0', 'Mozilla Firefox ESR <91.3.0', 'Mozilla Thunderbird <91.3.0']

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-38507"
    }
  },
  "description": "Mozilla Firefox\u662f\u7f8e\u56fdMozilla\u57fa\u91d1\u4f1a\u7684\u4e00\u6b3e\u5f00\u6e90Web\u6d4f\u89c8\u5668\u3002\n\nMozilla Firefox\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eHTTP2 (RFC 8164) \u7684\u673a\u4f1a\u52a0\u5bc6\u529f\u80fd\u5141\u8bb8\u5c06\u8fde\u63a5\u900f\u660e\u5730\u5347\u7ea7\u5230TLS\uff0c\u540c\u65f6\u4fdd\u7559 HTTP \u8fde\u63a5\u7684\u89c6\u89c9\u5c5e\u6027\uff0c\u5305\u62ec\u4e0e\u7aef\u53e3 80 \u4e0a\u7684\u672a\u52a0\u5bc6\u8fde\u63a5\u540c\u6e90\u3002\u76f8\u540c\u7684 IP \u5730\u5740\uff08\u4f8b\u5982\u7aef\u53e3 8443\uff09\u672a\u80fd\u9009\u62e9\u52a0\u5165\u673a\u4f1a\u52a0\u5bc6\uff1b\u7f51\u7edc\u653b\u51fb\u8005\u53ef\u4ee5\u5c06\u6d4f\u89c8\u5668\u5230 443 \u7aef\u53e3\u7684\u8fde\u63a5\u8f6c\u53d1\u5230 8443 \u7aef\u53e3\uff0c\u4ece\u800c\u5bfc\u81f4\u6d4f\u89c8\u5668\u5c06 8443 \u7aef\u53e3\u7684\u5185\u5bb9\u89c6\u4e3a\u4e0e HTTP \u540c\u6e90\u3002\u8fd9\u662f\u901a\u8fc7\u7981\u7528\u4f7f\u7528\u7387\u8f83\u4f4e\u7684\u673a\u4f1a\u52a0\u5bc6\u529f\u80fd\u89e3\u51b3\u7684\u3002 \u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2021-48/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-101167",
  "openTime": "2021-12-21",
  "patchDescription": "Mozilla Firefox\u662f\u7f8e\u56fdMozilla\u57fa\u91d1\u4f1a\u7684\u4e00\u6b3e\u5f00\u6e90Web\u6d4f\u89c8\u5668\u3002\r\n\r\nMozilla Firefox\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eHTTP2 (RFC 8164) \u7684\u673a\u4f1a\u52a0\u5bc6\u529f\u80fd\u5141\u8bb8\u5c06\u8fde\u63a5\u900f\u660e\u5730\u5347\u7ea7\u5230TLS\uff0c\u540c\u65f6\u4fdd\u7559 HTTP \u8fde\u63a5\u7684\u89c6\u89c9\u5c5e\u6027\uff0c\u5305\u62ec\u4e0e\u7aef\u53e3 80 \u4e0a\u7684\u672a\u52a0\u5bc6\u8fde\u63a5\u540c\u6e90\u3002\u76f8\u540c\u7684 IP \u5730\u5740\uff08\u4f8b\u5982\u7aef\u53e3 8443\uff09\u672a\u80fd\u9009\u62e9\u52a0\u5165\u673a\u4f1a\u52a0\u5bc6\uff1b\u7f51\u7edc\u653b\u51fb\u8005\u53ef\u4ee5\u5c06\u6d4f\u89c8\u5668\u5230 443 \u7aef\u53e3\u7684\u8fde\u63a5\u8f6c\u53d1\u5230 8443 \u7aef\u53e3\uff0c\u4ece\u800c\u5bfc\u81f4\u6d4f\u89c8\u5668\u5c06 8443 \u7aef\u53e3\u7684\u5185\u5bb9\u89c6\u4e3a\u4e0e HTTP \u540c\u6e90\u3002\u8fd9\u662f\u901a\u8fc7\u7981\u7528\u4f7f\u7528\u7387\u8f83\u4f4e\u7684\u673a\u4f1a\u52a0\u5bc6\u529f\u80fd\u89e3\u51b3\u7684\u3002 \u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Mozilla Firefox\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-101167\uff09\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Mozilla Firefox \u003c94.0",
      "Mozilla Firefox ESR \u003c91.3.0",
      "Mozilla Thunderbird \u003c91.3.0"
    ]
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-38507",
  "serverity": "\u4e2d",
  "submitTime": "2021-11-04",
  "title": "Mozilla Firefox\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-101167\uff09"
}

CVE-2021-38507 (GCVE-0-2021-38507)

Vulnerability from cvelistv5 – Published: 2021-12-08 21:21 – Updated: 2024-08-04 01:44

Summary

The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port 8443) did not opt-in to opportunistic encryption; a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

Severity

No CVSS data available.

CWE

Opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports

Assigner

mozilla mitre root

References

10 references

URL	Tags
https://www.mozilla.org/security/advisories/mfsa2…	x_refsource_MISC
https://www.mozilla.org/security/advisories/mfsa2…	x_refsource_MISC
https://www.mozilla.org/security/advisories/mfsa2…	x_refsource_MISC
https://bugzilla.mozilla.org/show_bug.cgi?id=1730935	x_refsource_MISC
https://www.debian.org/security/2021/dsa-5026	vendor-advisoryx_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
https://www.debian.org/security/2022/dsa-5034	vendor-advisoryx_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2022…	mailing-listx_refsource_MLIST
https://security.gentoo.org/glsa/202202-03	vendor-advisoryx_refsource_GENTOO
https://security.gentoo.org/glsa/202208-14	vendor-advisoryx_refsource_GENTOO

Impacted products

3 products

Vendor	Product	Version
Mozilla	Firefox	Affected: unspecified , < 94 (custom)
Mozilla	Thunderbird	Affected: unspecified , < 91.3 (custom)
Mozilla	Firefox ESR	Affected: unspecified , < 91.3 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T01:44:23.527Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.mozilla.org/security/advisories/mfsa2021-49/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.mozilla.org/security/advisories/mfsa2021-50/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.mozilla.org/security/advisories/mfsa2021-48/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1730935"
          },
          {
            "name": "DSA-5026",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2021/dsa-5026"
          },
          {
            "name": "[debian-lts-announce] 20211229 [SECURITY] [DLA 2863-1] firefox-esr security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html"
          },
          {
            "name": "DSA-5034",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5034"
          },
          {
            "name": "[debian-lts-announce] 20220104 [SECURITY] [DLA 2874-1] thunderbird security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html"
          },
          {
            "name": "GLSA-202202-03",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202202-03"
          },
          {
            "name": "GLSA-202208-14",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202208-14"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Firefox",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThan": "94",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Thunderbird",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThan": "91.3",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Firefox ESR",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThan": "91.3",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port 8443) did not opt-in to opportunistic encryption; a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage. This vulnerability affects Firefox \u003c 94, Thunderbird \u003c 91.3, and Firefox ESR \u003c 91.3."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-08-10T05:11:20.000Z",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.mozilla.org/security/advisories/mfsa2021-49/"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.mozilla.org/security/advisories/mfsa2021-50/"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.mozilla.org/security/advisories/mfsa2021-48/"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1730935"
        },
        {
          "name": "DSA-5026",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2021/dsa-5026"
        },
        {
          "name": "[debian-lts-announce] 20211229 [SECURITY] [DLA 2863-1] firefox-esr security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html"
        },
        {
          "name": "DSA-5034",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2022/dsa-5034"
        },
        {
          "name": "[debian-lts-announce] 20220104 [SECURITY] [DLA 2874-1] thunderbird security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html"
        },
        {
          "name": "GLSA-202202-03",
          "tags": [
            "vendor-advisory",
            "x_refsource_GENTOO"
          ],
          "url": "https://security.gentoo.org/glsa/202202-03"
        },
        {
          "name": "GLSA-202208-14",
          "tags": [
            "vendor-advisory",
            "x_refsource_GENTOO"
          ],
          "url": "https://security.gentoo.org/glsa/202208-14"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@mozilla.org",
          "ID": "CVE-2021-38507",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Firefox",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_value": "94"
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "Thunderbird",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_value": "91.3"
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "Firefox ESR",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_value": "91.3"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Mozilla"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port 8443) did not opt-in to opportunistic encryption; a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage. This vulnerability affects Firefox \u003c 94, Thunderbird \u003c 91.3, and Firefox ESR \u003c 91.3."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.mozilla.org/security/advisories/mfsa2021-49/",
              "refsource": "MISC",
              "url": "https://www.mozilla.org/security/advisories/mfsa2021-49/"
            },
            {
              "name": "https://www.mozilla.org/security/advisories/mfsa2021-50/",
              "refsource": "MISC",
              "url": "https://www.mozilla.org/security/advisories/mfsa2021-50/"
            },
            {
              "name": "https://www.mozilla.org/security/advisories/mfsa2021-48/",
              "refsource": "MISC",
              "url": "https://www.mozilla.org/security/advisories/mfsa2021-48/"
            },
            {
              "name": "https://bugzilla.mozilla.org/show_bug.cgi?id=1730935",
              "refsource": "MISC",
              "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1730935"
            },
            {
              "name": "DSA-5026",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2021/dsa-5026"
            },
            {
              "name": "[debian-lts-announce] 20211229 [SECURITY] [DLA 2863-1] firefox-esr security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html"
            },
            {
              "name": "DSA-5034",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2022/dsa-5034"
            },
            {
              "name": "[debian-lts-announce] 20220104 [SECURITY] [DLA 2874-1] thunderbird security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html"
            },
            {
              "name": "GLSA-202202-03",
              "refsource": "GENTOO",
              "url": "https://security.gentoo.org/glsa/202202-03"
            },
            {
              "name": "GLSA-202208-14",
              "refsource": "GENTOO",
              "url": "https://security.gentoo.org/glsa/202208-14"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
    "assignerShortName": "mozilla",
    "cveId": "CVE-2021-38507",
    "datePublished": "2021-12-08T21:21:41.000Z",
    "dateReserved": "2021-08-10T00:00:00.000Z",
    "dateUpdated": "2024-08-04T01:44:23.527Z",
    "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.

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.

Action not permitted

CNVD-2021-101167

CVE-2021-38507 (GCVE-0-2021-38507)

Tags

Sightings

Nomenclature

Related by attack behaviour