CVE-2025-20137 (GCVE-0-2025-20137)
Vulnerability from cvelistv5 – Published: 2025-05-07 17:31 – Updated: 2025-05-07 19:45
VLAI?
Summary
A vulnerability in the access control list (ACL) programming of Cisco IOS Software that is running on Cisco Catalyst 1000 Switches and Cisco Catalyst 2960L Switches could allow an unauthenticated, remote attacker to bypass a configured ACL.
This vulnerability is due to the use of both an IPv4 ACL and a dynamic ACL of IP Source Guard on the same interface, which is an unsupported configuration. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.
Note: Cisco documentation has been updated to reflect that this is an unsupported configuration. However, Cisco is publishing this advisory because the device will not prevent an administrator from configuring both features on the same interface. There are no plans to implement the ability to configure both features on the same interface on Cisco Catalyst 1000 or Catalyst 2960L Switches.
Severity ?
4.7 (Medium)
CWE
- CWE-284 - Improper Access Control
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cisco | IOS |
Affected:
15.2(5a)E
Affected: 15.2(5b)E Affected: 15.2(5c)E Affected: 15.2(6)E Affected: 15.2(6)E1 Affected: 15.2(6)E0c Affected: 15.2(6)E2 Affected: 15.2(7)E Affected: 15.2(6)E2b Affected: 15.2(7)E1 Affected: 15.2(7)E0a Affected: 15.2(7)E0s Affected: 15.2(6)E3 Affected: 15.2(7)E2 Affected: 15.2(7a)E0b Affected: 15.2(7)E3 Affected: 15.2(7)E1a Affected: 15.2(7b)E0b Affected: 15.2(7)E4 Affected: 15.2(7)E3k Affected: 15.2(8)E Affected: 15.2(8)E1 Affected: 15.2(7)E5 Affected: 15.2(7)E6 Affected: 15.2(8)E2 Affected: 15.2(7)E7 Affected: 15.2(8)E3 Affected: 15.2(7)E8 Affected: 15.2(8)E4 Affected: 15.2(7)E9 Affected: 15.2(8)E5 Affected: 15.2(8)E6 Affected: 15.2(7)E10 Affected: 15.2(7)E11 Affected: 15.2(7)E12 |
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"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-20137\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-05-07T18:56:17.944241Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-05-07T18:56:19.336Z\"}}], \"cna\": {\"source\": {\"defects\": [\"CSCwm03838\"], \"advisory\": \"cisco-sa-ipsgacl-pg6qfZk\", \"discovery\": \"INTERNAL\"}, \"metrics\": [{\"format\": \"cvssV3_1\", \"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 4.7, \"attackVector\": \"ADJACENT_NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"IOS\", \"versions\": [{\"status\": \"affected\", \"version\": \"15.2(5a)E\"}, {\"status\": \"affected\", \"version\": \"15.2(5b)E\"}, {\"status\": \"affected\", \"version\": \"15.2(5c)E\"}, {\"status\": \"affected\", \"version\": \"15.2(6)E\"}, {\"status\": \"affected\", \"version\": \"15.2(6)E1\"}, {\"status\": \"affected\", \"version\": \"15.2(6)E0c\"}, {\"status\": \"affected\", \"version\": \"15.2(6)E2\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E\"}, {\"status\": \"affected\", \"version\": \"15.2(6)E2b\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E1\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E0a\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E0s\"}, {\"status\": \"affected\", \"version\": \"15.2(6)E3\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E2\"}, {\"status\": \"affected\", \"version\": \"15.2(7a)E0b\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E3\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E1a\"}, {\"status\": \"affected\", \"version\": \"15.2(7b)E0b\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E4\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E3k\"}, {\"status\": \"affected\", \"version\": \"15.2(8)E\"}, {\"status\": \"affected\", \"version\": \"15.2(8)E1\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E5\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E6\"}, {\"status\": \"affected\", \"version\": \"15.2(8)E2\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E7\"}, {\"status\": \"affected\", \"version\": \"15.2(8)E3\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E8\"}, {\"status\": \"affected\", \"version\": \"15.2(8)E4\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E9\"}, {\"status\": \"affected\", \"version\": \"15.2(8)E5\"}, {\"status\": \"affected\", \"version\": \"15.2(8)E6\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E10\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E11\"}, {\"status\": \"affected\", \"version\": \"15.2(7)E12\"}]}], \"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.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipsgacl-pg6qfZk\", \"name\": \"cisco-sa-ipsgacl-pg6qfZk\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability in the access control list (ACL) programming of Cisco IOS Software that is running on Cisco Catalyst 1000 Switches and Cisco Catalyst 2960L Switches could allow an unauthenticated, remote attacker to bypass a configured ACL.\\r\\n\\r This vulnerability is due to the use of both an IPv4 ACL and a dynamic ACL of IP Source Guard on the same interface, which is an unsupported configuration. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.\\r\\n\\r Note: Cisco documentation has been updated to reflect that this is an unsupported configuration. However, Cisco is publishing this advisory because the device will not prevent an administrator from configuring both features on the same interface. There are no plans to implement the ability to configure both features on the same interface on Cisco Catalyst 1000 or Catalyst 2960L Switches.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-284\", \"description\": \"Improper Access Control\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2025-05-07T17:31:45.590Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2025-20137\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-07T19:45:55.934Z\", \"dateReserved\": \"2024-10-10T19:15:13.213Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2025-05-07T17:31:45.590Z\", \"assignerShortName\": \"cisco\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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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.
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