{
  "affected": [],
  "aliases": [
    "CVE-2022-20952"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-03-01T08:15:00Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability in the scanning engines of Cisco AsyncOS Software for Cisco Secure Web Appliance, formerly known as Cisco Web Security Appliance (WSA), could allow an unauthenticated, remote attacker to bypass a configured rule, thereby allowing traffic onto a network that should have been blocked. This vulnerability exists because malformed, encoded traffic is not properly detected. An attacker could exploit this vulnerability by connecting through an affected device to a malicious server and receiving malformed HTTP responses. A successful exploit could allow the attacker to bypass an explicit block rule and receive traffic that should have been rejected by the device.",
  "id": "GHSA-36pr-655q-f5wg",
  "modified": "2023-03-10T18:30:23Z",
  "published": "2023-03-01T09:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-20952"
    },
    {
      "type": "WEB",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-bypass-bwBfugek"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

{
  "document": {
    "acknowledgments": [
      {
        "summary": "Cisco would like to thank scanplus GmbH for reporting these vulnerabilities."
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "notes": [
      {
        "category": "summary",
        "text": "Multiple vulnerabilities in the scanning engines of Cisco AsyncOS Software for Cisco Secure Web Appliance, formerly Cisco Web Security Appliance (WSA), could allow an unauthenticated, remote attacker to bypass a configured rule, thereby allowing traffic onto a network that should have been blocked.\r\n\r\nThese vulnerabilities exist because malformed, encoded traffic is not properly detected. An attacker could exploit these vulnerabilities by connecting through an affected device to a malicious server and receiving malformed HTTP responses. A successful exploit could allow the attacker to bypass an explicit block rule and receive traffic that should have been rejected by the device.\r\n\r\nCisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.\r\n\r\n\r\n\r\nAttention: Simplifying the Cisco portfolio includes the renaming of security products under one brand: Cisco Secure. For more information, see Meet Cisco Secure [\"https://www.cisco.com/c/en/us/products/security/secure-names.html\"].",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "At the time of publication, these vulnerabilities affected Cisco Secure Web Appliance, both virtual and hardware versions.\r\n\r\nFor information about which Cisco software releases were vulnerable at the time of publication, see the Fixed Software [\"#fs\"] section of this advisory. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.",
        "title": "Vulnerable Products"
      },
      {
        "category": "general",
        "text": "Only products listed in the Vulnerable Products [\"#vp\"] section of this advisory are known to be affected by these vulnerabilities.\r\n\r\nCisco has confirmed that these vulnerabilities do not affect the following Cisco products:\r\n\r\nEmail Security Appliance (ESA), both virtual and hardware appliances\r\nSecure Email and Web Manager, both virtual and hardware appliances",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "There are no workarounds that address these vulnerabilities.",
        "title": "Workarounds"
      },
      {
        "category": "general",
        "text": "When considering software upgrades [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes\"], customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page [\"https://www.cisco.com/go/psirt\"], to determine exposure and a complete upgrade solution.\r\n\r\nIn all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.\r\n      Fixed Releases\r\nAt the time of publication, the release information in the following table was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.\r\n\r\nThe left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerabilities that are described in this advisory and which release included the fix for these vulnerabilities.\r\n        Cisco AsyncOS Release  First Fixed Release          11.7 and earlier  Not vulnerable.      11.8  Migrate to a fixed release.      12.0  Migrate to a fixed release.      12.5  Migrate to a fixed release.      14.0  14.0.4      14.5  14.5.1-016\r\nThe Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.",
        "title": "Fixed Software"
      },
      {
        "category": "general",
        "text": "To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy [\"http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html\"]. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.",
        "title": "Vulnerability Policy"
      },
      {
        "category": "general",
        "text": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.",
        "title": "Exploitation and Public Announcements"
      },
      {
        "category": "general",
        "text": "Cisco would like to thank scanplus GmbH for reporting these vulnerabilities.",
        "title": "Source"
      },
      {
        "category": "legal_disclaimer",
        "text": "THIS DOCUMENT IS PROVIDED ON AN \"AS IS\" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.\r\n\r\nA standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products.",
        "title": "Legal Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "Emergency Support:\r\n+1 877 228 7302 (toll-free within North America)\r\n+1 408 525 6532 (International direct-dial)\r\nNon-emergency Support:\r\nEmail: psirt@cisco.com\r\nSupport requests that are received via e-mail are typically acknowledged within 48 hours.",
      "issuing_authority": "Cisco product security incident response is the responsibility of the Cisco Product Security Incident Response Team (PSIRT). The Cisco PSIRT is a dedicated, global team that manages the receipt, investigation, and public reporting of security vulnerability information that is related to Cisco products and networks. The on-call Cisco PSIRT works 24x7 with Cisco customers, independent security researchers, consultants, industry organizations, and other vendors to identify possible security issues with Cisco products and networks.\r\nMore information can be found in Cisco Security Vulnerability Policy available at https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html",
      "name": "Cisco",
      "namespace": "https://wwww.cisco.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "Cisco Secure Web Appliance Content Encoding Filter Bypass Vulnerabilities",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-bypass-bwBfugek"
      },
      {
        "category": "external",
        "summary": "Cisco Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      },
      {
        "category": "external",
        "summary": "Meet Cisco Secure",
        "url": "https://www.cisco.com/c/en/us/products/security/secure-names.html"
      },
      {
        "category": "external",
        "summary": "considering software upgrades",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;Security Advisories page",
        "url": "https://www.cisco.com/go/psirt"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco Secure Web Appliance Content Encoding Filter Bypass Vulnerabilities",
    "tracking": {
      "current_release_date": "2023-04-03T13:46:35+00:00",
      "generator": {
        "date": "2023-04-03T13:46:40+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-wsa-bypass-bwBfugek",
      "initial_release_date": "2022-10-05T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2022-10-05T15:38:03+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        },
        {
          "date": "2023-02-15T17:34:08+00:00",
          "number": "1.1.0",
          "summary": "Added fixed release information. Added references to the Fixed Software section."
        },
        {
          "date": "2023-03-02T20:18:46+00:00",
          "number": "1.2.0",
          "summary": "Added details about newly introduced vulnerabilities and future fix plans for those vulnerabilities."
        },
        {
          "date": "2023-04-03T13:46:35+00:00",
          "number": "2.0.0",
          "summary": "Added CVE-2023-20099. Added Cisco bug ID CSCwe16408. Updated the summary and the fixed release table."
        }
      ],
      "status": "final",
      "version": "2.0.0"
    }
  },
  "product_tree": {
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      {
        "branches": [
          {
            "category": "product_family",
            "name": "Cisco Secure Web Appliance",
            "product": {
              "name": "Cisco Secure Web Appliance ",
              "product_id": "CSAFPID-189789"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
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      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwe16408"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-189789"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-189789"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-189789"
          ]
        }
      ],
      "title": "Cisco Secure Web Appliance Content Encoding Filter Bypass Vulnerability"
    },
    {
      "cve": "CVE-2022-20952",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwc54898"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-189789"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-189789"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-189789"
          ]
        }
      ],
      "title": "Cisco WSA secuerity bypass"
    }
  ]
}

{
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    "id": "GSD-2022-20952"
  },
  "gsd": {
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      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
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      ],
      "details": "A vulnerability in the scanning engines of Cisco AsyncOS Software for Cisco Secure Web Appliance, formerly known as Cisco Web Security Appliance (WSA), could allow an unauthenticated, remote attacker to bypass a configured rule, thereby allowing traffic onto a network that should have been blocked. This vulnerability exists because malformed, encoded traffic is not properly detected. An attacker could exploit this vulnerability by connecting through an affected device to a malicious server and receiving malformed HTTP responses. A successful exploit could allow the attacker to bypass an explicit block rule and receive traffic that should have been rejected by the device.",
      "id": "GSD-2022-20952",
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    }
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          }
        ]
      },
      "exploit": [
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          "lang": "en",
          "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."
        }
      ],
      "impact": {
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          {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
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            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
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          }
        ]
      },
      "problemtype": {
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                "value": "Improper Input Validation"
              }
            ]
          }
        ]
      },
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          }
        ]
      },
      "source": {
        "advisory": "cisco-sa-wsa-bypass-bwBfugek",
        "defects": [
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        ],
        "discovery": "INTERNAL"
      }
    },
    "nvd.nist.gov": {
      "cve": {
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          {
            "nodes": [
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                "cpeMatch": [
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                    "versionStartIncluding": "11.8",
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                  {
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                "negate": false,
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                    "vulnerable": false
                  },
                  {
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                  },
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          }
        ],
        "id": "CVE-2022-20952",
        "lastModified": "2024-01-25T17:15:22.127",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
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                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
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}

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Die Cisco Web Security Appliance sch\u00fctzt den Netzwerk-Perimeter vor Spyware und einer Vielzahl von webbasierten Bedrohungen. Sie kombiniert mehrere Sicherheitstechnologien wie beispielsweise eine tiefgreifende \u00dcberpr\u00fcfung der Anwendungsinhalte.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Cisco Web Security Appliance ausnutzen, um Sicherheitsvorkehrungen zu umgehen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- CISCO Appliance",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2022-1631 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2022/wid-sec-w-2022-1631.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2022-1631 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2022-1631"
      },
      {
        "category": "external",
        "summary": "Cisco Bug ID CSCWC54898 vom 2023-02-15",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-bypass-bwBfugek"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisory vom 2022-10-05",
        "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-bypass-bwBfugek"
      }
    ],
    "source_lang": "en-US",
    "title": "Cisco Web Security Appliance: Schwachstelle erm\u00f6glicht Umgehen von Sicherheitsvorkehrungen",
    "tracking": {
      "current_release_date": "2023-02-15T23:00:00.000+00:00",
      "generator": {
        "date": "2024-02-15T16:59:52.704+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.0"
        }
      },
      "id": "WID-SEC-W-2022-1631",
      "initial_release_date": "2022-10-05T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2022-10-05T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2023-02-15T23:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Cisco aufgenommen"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Cisco Web Security Appliance",
            "product": {
              "name": "Cisco Web Security Appliance",
              "product_id": "T007921",
              "product_identification_helper": {
                "cpe": "cpe:/a:cisco:web_security_appliance:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2022-20952",
      "notes": [
        {
          "category": "description",
          "text": "Es existiert eine Schwachstelle in Cisco Web Security Appliance. Der Fehler besteht, weil fehlerhafter, verschl\u00fcsselter Datenverkehr nicht richtig erkannt wird. Ein entfernter, anonymer Angreifer kann diese Schwachstelle ausnutzen, indem er \u00fcber ein betroffenes Ger\u00e4t eine Verbindung zu einem b\u00f6sartigen Server herstellt und fehlerhafte HTTP-Antworten empf\u00e4ngt, um eine explizite Blockierungsregel zu umgehen und Datenverkehr zu empfangen, der vom Ger\u00e4t h\u00e4tte abgelehnt werden m\u00fcssen."
        }
      ],
      "product_status": {
        "known_affected": [
          "T007921"
        ]
      },
      "release_date": "2022-10-05T22:00:00Z",
      "title": "CVE-2022-20952"
    }
  ]
}