CVE-2018-1000204 Detail

Current Description

** DISPUTED ** Linux Kernel version 3.18 to 4.16 incorrectly handles an SG_IO ioctl on /dev/sg0 with dxfer_direction=SG_DXFER_FROM_DEV and an empty 6-byte cmdp. This may lead to copying up to 1000 kernel heap pages to the userspace. This has been fixed upstream in https://github.com/torvalds/linux/commit/a45b599ad808c3c982fdcdc12b0b8611c2f92824 already. The problem has limited scope, as users don't usually have permissions to access SCSI devices. On the other hand, e.g. the Nero user manual suggests doing `chmod o+r+w /dev/sg*` to make the devices accessible. NOTE: third parties dispute the relevance of this report, noting that the requirement for an attacker to have both the CAP_SYS_ADMIN and CAP_SYS_RAWIO capabilities makes it "virtually impossible to exploit."


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  5.3 MEDIUM
Vector:  CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00043.html
http://www.openwall.com/lists/oss-security/2018/06/26/3 Mailing List  Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:2948 Third Party Advisory 
https://github.com/torvalds/linux/commit/a45b599ad808c3c982fdcdc12b0b8611c2f92824 Patch  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html Third Party Advisory 
https://usn.ubuntu.com/3696-1/ Third Party Advisory 
https://usn.ubuntu.com/3696-2/ Third Party Advisory 
https://usn.ubuntu.com/3752-1/ Third Party Advisory 
https://usn.ubuntu.com/3752-2/ Third Party Advisory 
https://usn.ubuntu.com/3752-3/ Third Party Advisory 
https://usn.ubuntu.com/3754-1/ Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

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Change History

11 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-1000204
NVD Published Date:
06/26/2018
NVD Last Modified:
10/02/2019
Source:
MITRE