ghsa-8j5h-gvcc-pfhw
Vulnerability from github
Published
2022-05-13 01:25
Modified
2022-05-13 01:25
Severity ?
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.
{ "affected": [], "aliases": [ "CVE-2018-10901" ], "database_specific": { "cwe_ids": [], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2018-07-26T17:29:00Z", "severity": "HIGH" }, "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": "GHSA-8j5h-gvcc-pfhw", "modified": "2022-05-13T01:25:18Z", "published": "2022-05-13T01:25:18Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-10901" }, { "type": "WEB", "url": "https://access.redhat.com/errata/RHSA-2018:2390" }, { "type": "WEB", "url": "https://access.redhat.com/errata/RHSA-2018:2391" }, { "type": "WEB", "url": "https://access.redhat.com/errata/RHSA-2018:2392" }, { "type": "WEB", "url": "https://access.redhat.com/errata/RHSA-2018:2393" }, { "type": "WEB", "url": "https://access.redhat.com/errata/RHSA-2018:2394" }, { "type": "WEB", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10901" }, { "type": "WEB", "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36" }, { "type": "WEB", "url": "https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0" }, { "type": "WEB", "url": "https://www.oracle.com/security-alerts/cpujul2020.html" }, { "type": "WEB", "url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html" }, { "type": "WEB", "url": "http://www.securityfocus.com/bid/104905" } ], "schema_version": "1.4.0", "severity": [ { "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "type": "CVSS_V3" } ] }
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Sightings
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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.