CVE-2023-20042 (GCVE-0-2023-20042)

Vulnerability from cvelistv5 – Published: 2023-11-01 17:11 – Updated: 2024-08-02 08:57
VLAI?
Summary
A vulnerability in the AnyConnect SSL VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an implementation error within the SSL/TLS session handling process that can prevent the release of a session handler under specific conditions. An attacker could exploit this vulnerability by sending crafted SSL/TLS traffic to an affected device, increasing the probability of session handler leaks. A successful exploit could allow the attacker to eventually deplete the available session handler pool, preventing new sessions from being established and causing a DoS condition.
Severity ?
6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE
  • CWE-404 - Improper Resource Shutdown or Release
Assigner
References
Impacted products
Vendor Product Version
Cisco Cisco Adaptive Security Appliance (ASA) Software Affected: 9.16.1
Affected: 9.16.1.28
Affected: 9.16.2
Affected: 9.16.2.3
Affected: 9.16.2.7
Affected: 9.16.2.11
Affected: 9.16.2.13
Affected: 9.16.2.14
Affected: 9.16.3
Affected: 9.16.3.3
Affected: 9.16.3.14
Affected: 9.16.3.15
Affected: 9.16.3.19
Affected: 9.16.3.23
Affected: 9.16.4
Affected: 9.16.4.9
Affected: 9.17.1
Affected: 9.17.1.7
Affected: 9.17.1.9
Affected: 9.17.1.10
Affected: 9.17.1.11
Affected: 9.17.1.13
Affected: 9.17.1.15
Affected: 9.17.1.20
Affected: 9.18.1
Affected: 9.18.1.3
Affected: 9.18.2
Affected: 9.18.2.5
Affected: 9.18.2.7
Affected: 9.19.1
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    Cisco Cisco Firepower Threat Defense Software Affected: 7.0.0
Affected: 7.0.0.1
Affected: 7.0.1
Affected: 7.0.1.1
Affected: 7.0.2
Affected: 7.0.2.1
Affected: 7.0.3
Affected: 7.0.4
Affected: 7.0.5
Affected: 7.1.0
Affected: 7.1.0.1
Affected: 7.1.0.2
Affected: 7.1.0.3
Affected: 7.2.0
Affected: 7.2.0.1
Affected: 7.2.1
Affected: 7.2.2
Affected: 7.2.3
Affected: 7.3.0
Affected: 7.3.1
Affected: 7.3.1.1
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"A vulnerability in the AnyConnect SSL VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an implementation error within the SSL/TLS session handling process that can prevent the release of a session handler under specific conditions. An attacker could exploit this vulnerability by sending crafted SSL/TLS traffic to an affected device, increasing the probability of session handler leaks. A successful exploit could allow the attacker to eventually deplete the available session handler pool, preventing new sessions from being established and causing a DoS condition.\"}, {\"lang\": \"es\", \"value\": \"Una vulnerabilidad en la funci\\u00f3n AnyConnect SSL VPN del software Cisco Adaptive Security Appliance (ASA) y el software Cisco Firepower Threat Defense (FTD) podr\\u00eda permitir que un atacante remoto no autenticado cause una condici\\u00f3n de Denegaci\\u00f3n de Servicio (DoS) en un dispositivo afectado. Esta vulnerabilidad se debe a un error de implementaci\\u00f3n dentro del proceso de manejo de sesiones SSL/TLS que puede impedir la liberaci\\u00f3n de un controlador de sesi\\u00f3n en condiciones espec\\u00edficas. Un atacante podr\\u00eda aprovechar esta vulnerabilidad enviando tr\\u00e1fico SSL/TLS manipulado a un dispositivo afectado, lo que aumenta la probabilidad de fugas del controlador de sesi\\u00f3n. Un exploit exitoso podr\\u00eda permitir al atacante agotar eventualmente el grupo de controladores de sesiones disponible, impidiendo que se establezcan nuevas sesiones y provocando una condici\\u00f3n DoS.\"}]",
      "id": "CVE-2023-20042",
      "lastModified": "2024-11-21T07:40:25.200",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"ykramarz@cisco.com\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H\", \"baseScore\": 6.8, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"CHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 2.2, \"impactScore\": 4.0}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H\", \"baseScore\": 8.6, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"CHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 4.0}]}",
      "published": "2023-11-01T18:15:08.843",
      "references": "[{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ssl-dos-kxG8mpUA\", \"source\": \"ykramarz@cisco.com\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ssl-dos-kxG8mpUA\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}]",
      "sourceIdentifier": "ykramarz@cisco.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"ykramarz@cisco.com\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-404\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"NVD-CWE-noinfo\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-20042\",\"sourceIdentifier\":\"psirt@cisco.com\",\"published\":\"2023-11-01T18:15:08.843\",\"lastModified\":\"2024-11-21T07:40:25.200\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the AnyConnect SSL VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an implementation error within the SSL/TLS session handling process that can prevent the release of a session handler under specific conditions. An attacker could exploit this vulnerability by sending crafted SSL/TLS traffic to an affected device, increasing the probability of session handler leaks. A successful exploit could allow the attacker to eventually deplete the available session handler pool, preventing new sessions from being established and causing a DoS condition.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad en la funci\u00f3n AnyConnect SSL VPN del software Cisco Adaptive Security Appliance (ASA) y el software Cisco Firepower Threat Defense (FTD) podr\u00eda permitir que un atacante remoto no autenticado cause una condici\u00f3n de Denegaci\u00f3n de Servicio (DoS) en un dispositivo afectado. Esta vulnerabilidad se debe a un error de implementaci\u00f3n dentro del proceso de manejo de sesiones SSL/TLS que puede impedir la liberaci\u00f3n de un controlador de sesi\u00f3n en condiciones espec\u00edficas. Un atacante podr\u00eda aprovechar esta vulnerabilidad enviando tr\u00e1fico SSL/TLS manipulado a un dispositivo afectado, lo que aumenta la probabilidad de fugas del controlador de sesi\u00f3n. Un exploit exitoso podr\u00eda permitir al atacante agotar eventualmente el grupo de controladores de sesiones disponible, impidiendo que se establezcan nuevas sesiones y provocando una condici\u00f3n DoS.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H\",\"baseScore\":6.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.2,\"impactScore\":4.0},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H\",\"baseScore\":8.6,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":4.0}]},\"weaknesses\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-404\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"BBCA75A6-0A3E-4393-8884-9F3CE190641E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.0.0.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"3F3C12D3-7662-46C5-9E88-D1BE6CF605E0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.0.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"046B53A0-6BC1-461A-9C28-C534CE12C4BD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.0.1.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"3CA889E1-4E8F-4ECE-88AC-7A240D5CBF0A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.0.2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5D1C767F-3E06-43B7-A0CC-D51D97A053EB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.0.2.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"43A950B0-A7CA-4CE7-A393-A18C8C41B08E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.0.3:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A7E221CB-BD0F-4AEE-8646-998B75647714\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.0.4:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"225382DE-2919-48F4-9CC0-DE685EAAFDF4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.0.5:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FBA2DFE7-F478-46EC-9832-4B2C738FC879\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.1.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D619BF54-1BA9-45D0-A876-92D7010088A0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.1.0.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"469EA365-DED5-4436-AAC2-5553529DE700\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.1.0.2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4D94F400-5A35-41F5-B37F-E9DA6F87ED8E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.1.0.3:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5364CB94-BEA3-4E9A-A2F9-EE96A2D7F8AB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.2.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"16FD5D12-CF1A-4990-99B3-1840EFBA5611\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.2.0.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FCD2D11D-FF08-44E4-BF67-D8DD1E701FCD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.2.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F788D156-1F1F-4A08-848B-257BC4CCE000\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.2.2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"795ED164-7800-4D50-8E37-665BE30190D9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.2.3:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"1B0664B8-1670-4F47-A01E-089D05A9618A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.3.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"EBC0C3DC-4761-488A-90A9-6EA45EE61526\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.3.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"62EE065B-F8B6-4125-8486-B2EE0566B27A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:firepower_threat_defense:7.3.1.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5245DEF8-64BE-47C9-AA3C-DF3F7F92A89F\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"13F57A86-6284-4269-823E-B30C57185D14\"},{\"vulnerable\":t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Advisory\"]},{\"url\":\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ssl-dos-kxG8mpUA\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}"
  }
}


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Taxonomy of the tags.




Sightings

Author Source Type Date

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.