CVE-2018-10901
First published: Tue Jul 17 2018(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/linux-kernel | <2.6.36 | 2.6.36 |
| Linux Linux kernel | <2.6.36 | |
| Redhat Enterprise Linux Desktop | =6.0 | |
| Redhat Enterprise Linux Server | =6.0 | |
| Redhat Enterprise Linux Server Aus | =6.4 | |
| Redhat Enterprise Linux Server Aus | =6.5 | |
| Redhat Enterprise Linux Server Aus | =6.6 | |
| Redhat Enterprise Linux Workstation | =6.0 |
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Reference Links
- http://www.securityfocus.com/bid/104905
- https://access.redhat.com/errata/RHSA-2018:2390
- https://access.redhat.com/errata/RHSA-2018:2391
- https://access.redhat.com/errata/RHSA-2018:2392
- https://access.redhat.com/errata/RHSA-2018:2393
- https://access.redhat.com/errata/RHSA-2018:2394
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10901
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36
- https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1601849
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