cve-2022-20837
Vulnerability from cvelistv5
Published
2022-10-10 20:43
Modified
2024-11-01 18:49
Severity ?
EPSS score ?
Summary
Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnerability
References
Impacted products
▼ | Vendor | Product |
---|---|---|
Cisco | Cisco IOS XE Software |
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This vulnerability is due to a logic error that occurs when an affected device inspects certain TCP DNS packets. An attacker could exploit this vulnerability by sending crafted DNS packets through the affected device that is performing NAT for DNS packets. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition on the affected device. Note: This vulnerability can be exploited only by sending IPv4 TCP packets through an affected device. This vulnerability cannot be exploited by sending IPv6 traffic." } ], "exploits": [ { "lang": "en", "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory." } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1" } } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-754", "description": "CWE-754", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "dateUpdated": "2022-10-10T00:00:00", "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco" }, "references": [ { "name": "20220928 Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnerability", "tags": [ "vendor-advisory" ], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-alg-dos-KU9Z8kFX" } ], "source": { "advisory": "cisco-sa-alg-dos-KU9Z8kFX", "defect": [ [ "CSCwa78096" ] ], "discovery": "INTERNAL" }, "title": "Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnerability" } }, "cveMetadata": { "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "assignerShortName": "cisco", "cveId": "CVE-2022-20837", "datePublished": "2022-10-10T20:43:16.154104Z", "dateReserved": "2021-11-02T00:00:00", "dateUpdated": "2024-11-01T18:49:14.323Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2022-20837\",\"sourceIdentifier\":\"ykramarz@cisco.com\",\"published\":\"2022-10-10T21:15:10.137\",\"lastModified\":\"2023-11-07T03:43:05.550\",\"vulnStatus\":\"Modified\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the DNS application layer gateway (ALG) functionality that is used by Network Address Translation (NAT) in Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. 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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
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