gsd-2018-10901
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
A flaw was found in Linux kernel's KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host's userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.
Aliases
Aliases
{ "GSD": { "alias": "CVE-2018-10901", "description": "A flaw was found in Linux kernel\u0027s KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host\u0027s userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.", "id": "GSD-2018-10901", "references": [ "https://www.suse.com/security/cve/CVE-2018-10901.html", "https://access.redhat.com/errata/RHSA-2018:2394", "https://access.redhat.com/errata/RHSA-2018:2393", "https://access.redhat.com/errata/RHSA-2018:2392", "https://access.redhat.com/errata/RHSA-2018:2391", "https://access.redhat.com/errata/RHSA-2018:2390", "https://alas.aws.amazon.com/cve/html/CVE-2018-10901.html", "https://linux.oracle.com/cve/CVE-2018-10901.html" ] }, "gsd": { "metadata": { "exploitCode": "unknown", "remediation": "unknown", "reportConfidence": "confirmed", "type": "vulnerability" }, "osvSchema": { "aliases": [ "CVE-2018-10901" ], "details": "A flaw was found in Linux kernel\u0027s KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host\u0027s userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.", "id": "GSD-2018-10901", "modified": "2023-12-13T01:22:41.017401Z", "schema_version": "1.4.0" } }, "namespaces": { "cve.org": { "CVE_data_meta": { "ASSIGNER": "secalert@redhat.com", "ID": "CVE-2018-10901", "STATE": "PUBLIC" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "kernel:", "version": { "version_data": [ { "version_value": "n/a" } ] } } ] }, "vendor_name": "[UNKNOWN]" } ] } }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "A flaw was found in Linux kernel\u0027s KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host\u0027s userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges." } ] }, "impact": { "cvss": [ [ { "vectorString": "7.8/CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.0" } ] ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "CWE-665" } ] } ] }, "references": { "reference_data": [ { "name": "104905", "refsource": "BID", "url": "http://www.securityfocus.com/bid/104905" }, { "name": "RHSA-2018:2393", "refsource": "REDHAT", "url": "https://access.redhat.com/errata/RHSA-2018:2393" }, { "name": "RHSA-2018:2390", "refsource": "REDHAT", "url": "https://access.redhat.com/errata/RHSA-2018:2390" }, { "name": "RHSA-2018:2391", "refsource": "REDHAT", "url": "https://access.redhat.com/errata/RHSA-2018:2391" }, { "name": "RHSA-2018:2392", "refsource": "REDHAT", "url": "https://access.redhat.com/errata/RHSA-2018:2392" }, { "name": "RHSA-2018:2394", "refsource": "REDHAT", "url": "https://access.redhat.com/errata/RHSA-2018:2394" }, { "name": "https://www.oracle.com/security-alerts/cpujul2020.html", "refsource": "MISC", "url": "https://www.oracle.com/security-alerts/cpujul2020.html" }, { "name": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html", "refsource": "MISC", "url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html" }, { "name": "https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0", "refsource": "CONFIRM", "url": "https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0" }, { "name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36", "refsource": "CONFIRM", "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36" }, { "name": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10901", "refsource": "CONFIRM", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10901" } ] } }, "nvd.nist.gov": { "configurations": { "CVE_data_version": "4.0", "nodes": [ { "children": [], "cpe_match": [ { "cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "2.6.36", "vulnerable": true } ], "operator": "OR" }, { "children": [], "cpe_match": [ { "cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server_aus:6.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true }, { "cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true }, { "cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server_aus:6.4:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true }, { "cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true }, { "cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true }, { "cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true } ], "operator": "OR" } ] }, "cve": { "CVE_data_meta": { "ASSIGNER": "secalert@redhat.com", "ID": "CVE-2018-10901" }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "en", "value": "A flaw was found in Linux kernel\u0027s KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host\u0027s userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "en", "value": "NVD-CWE-noinfo" } ] } ] }, "references": { "reference_data": [ { "name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36", "refsource": "CONFIRM", "tags": [ "Patch", "Vendor Advisory" ], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36" }, { "name": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10901", "refsource": "CONFIRM", "tags": [ "Issue Tracking", "Patch", "Third Party Advisory" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10901" }, { "name": "104905", "refsource": "BID", "tags": [ "Third Party Advisory", "VDB Entry" ], "url": "http://www.securityfocus.com/bid/104905" }, { "name": "RHSA-2018:2394", "refsource": "REDHAT", "tags": [ "Third Party Advisory" ], "url": "https://access.redhat.com/errata/RHSA-2018:2394" }, { "name": "RHSA-2018:2393", "refsource": "REDHAT", "tags": [ "Third Party Advisory" ], "url": "https://access.redhat.com/errata/RHSA-2018:2393" }, { "name": "RHSA-2018:2392", "refsource": "REDHAT", "tags": [ "Third Party Advisory" ], "url": "https://access.redhat.com/errata/RHSA-2018:2392" }, { "name": "RHSA-2018:2391", "refsource": "REDHAT", "tags": [ "Third Party Advisory" ], "url": "https://access.redhat.com/errata/RHSA-2018:2391" }, { "name": "RHSA-2018:2390", "refsource": "REDHAT", "tags": [ "Third Party Advisory" ], "url": "https://access.redhat.com/errata/RHSA-2018:2390" }, { "name": "https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0", "refsource": "CONFIRM", "tags": [ "Third Party Advisory" ], "url": "https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0" }, { "name": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html", "refsource": "MISC", "tags": [ "Patch", "Third Party Advisory" ], "url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html" }, { "name": "https://www.oracle.com/security-alerts/cpujul2020.html", "refsource": "MISC", "tags": [ "Third Party Advisory" ], "url": "https://www.oracle.com/security-alerts/cpujul2020.html" } ] } }, "impact": { "baseMetricV2": { "cvssV2": { "accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.2, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0" }, "exploitabilityScore": 3.9, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "severity": "HIGH", "userInteractionRequired": false }, "baseMetricV3": { "cvssV3": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "exploitabilityScore": 1.8, "impactScore": 5.9 } }, "lastModifiedDate": "2023-02-24T18:43Z", "publishedDate": "2018-07-26T17:29Z" } } }
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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.