Debian Security Advisory DSA 4444-1 (linux - security update)

Published: 2019-05-16 02:00:12
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:P/I:N/A:N

Summary:
The remote host is missing an update for the 'linux' Linux Distribution Package(s) announced via the DSA-4444-1 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
Multiple researchers have discovered vulnerabilities in the way the Intel processor designs have implemented speculative forwarding of data filled into temporary microarchitectural structures (buffers). This flaw could allow an attacker controlling an unprivileged process to read sensitive information, including from the kernel and all other processes running on the system or cross guest/host boundaries to read host memory. See the references for more details. To fully resolve these vulnerabilities it is also necessary to install updated CPU microcode. An updated intel-microcode Linux Distribution Package (only available in Debian non-free) will be provided via a separate DSA. The updated CPU microcode may also be available as part of a system firmware ('BIOS') update. In addition, this update includes a fix for a regression causing deadlocks inside the loopback driver, which was introduced by the update to 4.9.168 in the last Stretch point release.

Affected Versions:
'linux' Linux Distribution Package(s) on Debian Linux.

Recommendations:
For the stable distribution (stretch), these problems have been fixed in version 4.9.168-1+deb9u2. We recommend that you upgrade your linux Linux Distribution Packages.

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2018-12126
https://nvd.nist.gov/vuln/detail/CVE-2018-12127
https://nvd.nist.gov/vuln/detail/CVE-2018-12130
https://nvd.nist.gov/vuln/detail/CVE-2019-11091

References:

https://www.debian.org/security/2019/dsa-4444.html
https://security-tracker.debian.org/tracker/DSA-4444-1
https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/mds.html

Severity
Medium
CVSS Score
5.0
Published
2019-05-16
Modified
2019-05-16
Category
Debian Local Security Checks

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