CVE-1999-1466 - Vulnerability Details - OpenCVE

Description

Vulnerability in Cisco routers versions 8.2 through 9.1 allows remote attackers to bypass access control lists when extended IP access lists are used on certain interfaces, the IP route cache is enabled, and the access list uses the "established" keyword.

Published: 2001-09-12

Score: 7.5 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

OR	cpe:2.3:o:cisco:ios:8.2:::::::*
	cpe:2.3:o:cisco:ios:8.3:::::::*
	cpe:2.3:o:cisco:ios:9.0:::::::*
	cpe:2.3:o:cisco:ios:9.1:::::::*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-1999-1447	Vulnerability in Cisco routers versions 8.2 through 9.1 allows remote attackers to bypass access control lists when extended IP access lists are used on certain interfaces, the IP route cache is enabled, and the access list uses the "established" keyword.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00296.

Key SSVC decision points have not yet been added.

References

Link	Providers
http://www.cert.org/advisories/CA-1992-20.html
http://www.securityfocus.com/bid/53

History

No history.

Subscriptions

Cisco Ios

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2001-09-12T04:00:00.000Z

Updated: 2024-08-01T17:18:07.269Z

Reserved: 2001-08-31T00:00:00.000Z

Link: CVE-1999-1466

Vulnrichment

No data.

NVD

Status : Modified

Published: 1992-12-10T05:00:00.000

Modified: 2026-04-16T00:27:16.627

Link: CVE-1999-1466

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

NVD-CWE-Other

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "1992-12-10T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "Vulnerability in Cisco routers versions 8.2 through 9.1 allows remote attackers to bypass access control lists when extended IP access lists are used on certain interfaces, the IP route cache is enabled, and the access list uses the \"established\" keyword."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2003-05-08T09:00:00.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"name": "CA-1992-20", "tags": ["third-party-advisory", "x_refsource_CERT"], "url": "http://www.cert.org/advisories/CA-1992-20.html"}, {"name": "53", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/53"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-1999-1466", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Vulnerability in Cisco routers versions 8.2 through 9.1 allows remote attackers to bypass access control lists when extended IP access lists are used on certain interfaces, the IP route cache is enabled, and the access list uses the \"established\" keyword."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "CA-1992-20", "refsource": "CERT", "url": "http://www.cert.org/advisories/CA-1992-20.html"}, {"name": "53", "refsource": "BID", "url": "http://www.securityfocus.com/bid/53"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-01T17:18:07.269Z"}, "title": "CVE Program Container", "references": [{"name": "CA-1992-20", "tags": ["third-party-advisory", "x_refsource_CERT", "x_transferred"], "url": "http://www.cert.org/advisories/CA-1992-20.html"}, {"name": "53", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/53"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-1999-1466", "datePublished": "2001-09-12T04:00:00.000Z", "dateReserved": "2001-08-31T00:00:00.000Z", "dateUpdated": "2024-08-01T17:18:07.269Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:cisco:ios:8.2:*:*:*:*:*:*:*", "matchCriteriaId": "E72B3032-154D-45C2-8380-CCB28E4F2E8C", "vulnerable": true}, {"criteria": "cpe:2.3:o:cisco:ios:8.3:*:*:*:*:*:*:*", "matchCriteriaId": "87395248-5E9C-4257-9CC7-2E2805B69F83", "vulnerable": true}, {"criteria": "cpe:2.3:o:cisco:ios:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "A476BFB0-E587-41A6-B691-2609E0146C2B", "vulnerable": true}, {"criteria": "cpe:2.3:o:cisco:ios:9.1:*:*:*:*:*:*:*", "matchCriteriaId": "2E9A00D5-A594-4C64-B982-10CB4C554F51", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Vulnerability in Cisco routers versions 8.2 through 9.1 allows remote attackers to bypass access control lists when extended IP access lists are used on certain interfaces, the IP route cache is enabled, and the access list uses the \"established\" keyword."}], "id": "CVE-1999-1466", "lastModified": "2026-04-16T00:27:16.627", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "1992-12-10T05:00:00.000", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory", "US Government Resource"], "url": "http://www.cert.org/advisories/CA-1992-20.html"}, {"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "http://www.securityfocus.com/bid/53"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory", "US Government Resource"], "url": "http://www.cert.org/advisories/CA-1992-20.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "http://www.securityfocus.com/bid/53"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}