Executive Summary
Informations | |||
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Name | CVE-2018-12892 | First vendor Publication | 2018-07-02 |
Vendor | Cve | Last vendor Modification | 2019-03-29 |
Security-Database Scoring CVSS v3
Cvss vector : CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | |||
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Overall CVSS Score | 9.9 | ||
Base Score | 9.9 | Environmental Score | 9.9 |
impact SubScore | 6 | Temporal Score | 9.9 |
Exploitabality Sub Score | 3.1 | ||
Attack Vector | Network | Attack Complexity | Low |
Privileges Required | Low | User Interaction | None |
Scope | Changed | Confidentiality Impact | High |
Integrity Impact | High | Availability Impact | High |
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : (AV:N/AC:L/Au:S/C:P/I:P/A:P) | |||
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Cvss Base Score | 6.5 | Attack Range | Network |
Cvss Impact Score | 6.4 | Attack Complexity | Low |
Cvss Expoit Score | 8 | Authentication | Requires single instance |
Calculate full CVSS 2.0 Vectors scores |
Detail
An issue was discovered in Xen 4.7 through 4.10.x. libxl fails to pass the readonly flag to qemu when setting up a SCSI disk, due to what was probably an erroneous merge conflict resolution. Malicious guest administrators or (in some situations) users may be able to write to supposedly read-only disk images. Only emulated SCSI disks (specified as "sd" in the libxl disk configuration, or an equivalent) are affected. IDE disks ("hd") are not affected (because attempts to make them readonly are rejected). Additionally, CDROM devices (that is, devices specified to be presented to the guest as CDROMs, regardless of the nature of the backing storage on the host) are not affected; they are always read only. Only systems using qemu-xen (rather than qemu-xen-traditional) as the device model version are vulnerable. Only systems using libxl or libxl-based toolstacks are vulnerable. (This includes xl, and libvirt with the libxl driver.) The vulnerability is present in Xen versions 4.7 and later. (In earlier versions, provided that the patch for XSA-142 has been applied, attempts to create read only disks are rejected.) If the host and guest together usually support PVHVM, the issue is exploitable only if the malicious guest administrator has control of the guest kernel or guest kernel command line. |
Original Source
Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12892 |
CWE : Common Weakness Enumeration
% | Id | Name |
---|---|---|
100 % | CWE-200 | Information Exposure |
CPE : Common Platform Enumeration
Nessus® Vulnerability Scanner
Date | Description |
---|---|
2019-01-03 | Name : The remote Fedora host is missing a security update. File : fedora_2018-a7862a75f5.nasl - Type : ACT_GATHER_INFO |
2018-10-31 | Name : The remote Gentoo host is missing one or more security-related patches. File : gentoo_GLSA-201810-06.nasl - Type : ACT_GATHER_INFO |
2018-07-24 | Name : The remote Fedora host is missing a security update. File : fedora_2018-1a467757ce.nasl - Type : ACT_GATHER_INFO |
2018-06-29 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-4236.nasl - Type : ACT_GATHER_INFO |
Sources (Detail)
Alert History
Date | Informations |
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2021-09-02 01:28:29 |
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2021-05-04 13:08:19 |
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2021-04-22 02:22:10 |
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2021-03-27 01:24:18 |
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2020-05-23 02:11:03 |
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2020-05-23 01:07:06 |
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2019-10-10 12:10:47 |
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2019-04-27 12:07:39 |
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2019-03-29 21:19:30 |
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2018-10-31 13:21:24 |
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2018-09-05 00:19:36 |
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2018-07-04 09:19:47 |
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2018-07-02 21:19:43 |
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