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CVE-2020-4788 (GCVE-0-2020-4788)

Vulnerability from cvelistv5 – Published: 2020-11-20 03:45 – Updated: 2024-09-16 19:05
VLAI
Summary
IBM Power9 (AIX 7.1, 7.2, and VIOS 3.1) processors could allow a local user to obtain sensitive information from the data in the L1 cache under extenuating circumstances. IBM X-Force ID: 189296.
Severity
5.1 (Medium)
CVSS:3.0/PR:N/C:H/AV:L/AC:H/S:U/A:N/I:N/UI:N/E:U/RC:C/RL:O
CWE
  • Obtain Information
Assigner
References
Impacted products
Vendor Product Version CPE status
IBM VIOS Affected: 3.1
guessed Create a notification for this product.
IBM AIX Affected: 7.1
Affected: 7.2
guessed Create a notification for this product.
Date Public
2020-11-19 00:00
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189296\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N\",\"baseScore\":4.7,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.0,\"impactScore\":3.6}],\"cvssMetricV30\":[{\"source\":\"psirt@us.ibm.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N\",\"baseScore\":5.1,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.4,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:M/Au:N/C:P/I:N/A:N\",\"baseScore\":1.9,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"LOW\",\"exploitabilityScore\":3.4,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:ibm:vios:3.1.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"3939ADB4-5177-45C2-9C29-932E81D27F9E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:ibm:vios:3.1.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B809C4C8-2FE4-4DB6-8975-4259FF705D32\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:ibm:vios:3.1.2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4149DA62-D7FA-4431-8139-419AAB6EE744\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:ibm:aix:7.1.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2B1C208E-967A-40B1-AD9D-AFBA78D3C317\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:ibm:aix:7.1.5:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"48F204DE-2F8F-4854-A127-9CF20F3CEC2A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:ibm:aix:7.2.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"1AE65FF3-C4F6-4BAF-85D3-CA86D16E8B60\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:ibm:aix:7.2.3:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"EF8D4C29-833C-4467-B06A-D8067AAEF3D3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:ibm:aix:7.2.4:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"984D9159-2FF2-4D1E-94F7-CC207C04F125\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:ibm:aix:7.2.5:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"AB863845-F3F4-46AD-B686-F9B6B7EF3607\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:ibm:power9:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7BA7D79D-5032-41BC-BC5C-1029BD551FAF\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"36D96259-24BD-44E2-96D9-78CE1D41F956\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E460AA51-FCDA-46B9-AE97-E6676AA5E194\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"6EDB6772-7FDB-45FF-8D72-952902A7EE56\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:communications_cloud_native_core_network_exposure_function:22.1.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"9955F62A-75D3-4347-9AD3-5947FC365838\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:communications_cloud_native_core_policy:22.2.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7A6D77C7-A2F4-4700-AB5A-3EC853496ECA\"}]}]}],\"references\":[{\"url\":\"http://www.openwall.com/lists/oss-security/2020/11/20/3\",\"source\":\"psirt@us.ibm.com\",\"tags\":[\"Mailing List\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2020/11/23/1\",\"source\":\"psirt@us.ibm.com\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://exchange.xforce.ibmcloud.com/vulnerabilities/189296\",\"source\":\"psirt@us.ibm.com\",\"tags\":[\"VDB Entry\",\"Vendor Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TITJQPYDWZ4NB2ONJWUXW75KSQIPF35T/\",\"source\":\"psirt@us.ibm.com\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZF4OGZPKTAJJXWHPIFP3LHEWWEMR5LPT/\",\"source\":\"psirt@us.ibm.com\"},{\"url\":\"https://www.ibm.com/support/pages/node/6370729\",\"source\":\"psirt@us.ibm.com\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://www.oracle.com/security-alerts/cpujul2022.html\",\"source\":\"psirt@us.ibm.com\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2020/11/20/3\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2020/11/23/1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://exchange.xforce.ibmcloud.com/vulnerabilities/189296\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"VDB Entry\",\"Vendor Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TITJQPYDWZ4NB2ONJWUXW75KSQIPF35T/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZF4OGZPKTAJJXWHPIFP3LHEWWEMR5LPT/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.ibm.com/support/pages/node/6370729\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://www.oracle.com/security-alerts/cpujul2022.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T06:22:35+00:00",
      "cve": "CVE-2020-4788",
      "id": "CVE-2020-4788",
      "initial_release_date": "2020-11-20T00:00:00+00:00",
      "product_status:fixed": "120",
      "product_status:known_affected": "18",
      "product_status:known_not_affected": "54",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: speculation on incompletely validated data on IBM Power9",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-4788.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-02T02:32:44Z",
      "cve": "CVE-2020-4788",
      "id": "CVE-2020-4788",
      "initial_release_date": "2023-02-15T04:03:24Z",
      "product_status:known_affected": "304",
      "product_status:known_not_affected": "27",
      "product_status:recommended": "1625",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2020-4788",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-4788.json",
      "version": "41"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.