Debian Security Advisory DSA 4497-1 (linux - security update)

Published: 2019-08-14 02:01:31
CVE Author: NIST National Vulnerability Database

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

Summary:
The remote host is missing an update for the 'linux' Linux Distribution Package(s) announced via the DSA-4497-1 advisory.

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

Technical Details:
Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2015-8553Jan Beulich discovered that CVE-2015-2150 was not completely addressed. If a PCI physical function is passed through to a Xen guest, the guest is able to access its memory and I/O regions before enabling decoding of those regions. This could result in a denial-of-service (unexpected NMI) on the host. The fix for this is incompatible with qemu versions before 2.5. CVE-2017-18509 Denis Andzakovic reported a missing type check in the IPv4 multicast routing implementation. A user with the CAP_NET_ADMIN capability (in any user namespace) could use this for denial-of-service (memory corruption or crash) or possibly for privilege escalation. CVE-2018-5995 ADLab of VenusTech discovered that the kernel logged the virtual addresses assigned to per-CPU data, which could make it easier to exploit other vulnerabilities. CVE-2018-20836 chenxiang reported a race condition in libsas, the kernel subsystem supporting Serial Attached SCSI (SAS) devices, which could lead to a use-after-free. It is not clear how this might be exploited. CVE-2018-20856 Xiao Jin reported a potential double-free in the block subsystem, in case an error occurs while initialising the I/O scheduler for a block device. It is not clear how this might be exploited. CVE-2019-1125 It was discovered that most x86 processors could speculatively skip a conditional SWAPGS instruction used when entering the kernel from user mode, and/or could speculatively execute it when it should be skipped. This is a subtype of Spectre variant 1, which could allow local users to obtain sensitive information from the kernel or other processes. It has been mitigated by using memory barriers to limit speculative execution. Systems using an i386 kernel are not affected as the kernel does not use SWAPGS. CVE-2019-3882 It was found that the vfio implementation did not limit the number of DMA mappings to device memory. A local user granted ownership of a vfio device could use this to cause a denial of service (out-of-memory condition). CVE-2019-3900 It was discovered that vhost drivers did not properly control the amount of work done to service requests from guest VMs. A malicious guest could use this to cause a denial-of-service (unbounded CPU usage) on the host. CVE-2019-10207 The syzkaller tool found a potential null dereference in various drivers for UART-attached Bluetooth adapters. A local user with access to a pty device or other suitable tty device could use this for denial-of-service (BUG/oops). CVE-20 ... Description truncated. Please see the references for more information.

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

Recommendations:
For the oldstable distribution (stretch), these problems have been fixed in version 4.9.168-1+deb9u5. For the stable distribution (buster), these problems were mostly fixed in version 4.19.37-5+deb10u2 or earlier. 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-2015-2150
https://nvd.nist.gov/vuln/detail/CVE-2015-8553
https://nvd.nist.gov/vuln/detail/CVE-2017-18509
https://nvd.nist.gov/vuln/detail/CVE-2018-20836
https://nvd.nist.gov/vuln/detail/CVE-2018-20856
https://nvd.nist.gov/vuln/detail/CVE-2018-5995
https://nvd.nist.gov/vuln/detail/CVE-2019-10207
https://nvd.nist.gov/vuln/detail/CVE-2019-10638
https://nvd.nist.gov/vuln/detail/CVE-2019-10639
https://nvd.nist.gov/vuln/detail/CVE-2019-1125
https://nvd.nist.gov/vuln/detail/CVE-2019-13631
https://nvd.nist.gov/vuln/detail/CVE-2019-13648
https://nvd.nist.gov/vuln/detail/CVE-2019-14283
https://nvd.nist.gov/vuln/detail/CVE-2019-14284
https://nvd.nist.gov/vuln/detail/CVE-2019-3882
https://nvd.nist.gov/vuln/detail/CVE-2019-3900

References:

https://www.debian.org/security/2019/dsa-4497.html
https://security-tracker.debian.org/tracker/DSA-4497-1

Severity
High
CVSS Score
9.3
Published
2019-08-14
Modified
2019-08-16
Category
Debian Local Security Checks

Free Vulnerability Scanning, Assessment and Management

Mageni's Platform is packed with all the features you need to scan, assess and manage vulnerabilities like this - it is free, open source, lightning fast, reliable and scalable.

Router
Servers
Laptop
Database
Group
Cloud

Frequently Asked Questions

No, you can scan concurrently as many assets as you want. Please note that you must be aware of the hardware requeriments of the platform to ensure a good performance.

No, you can add as many assest as you want. It doesn't matters if you have millions of assets, we won't charge you for that.

No. The software is completely free. We have no intention to charge you to use the software, in fact - it completely goes against our beliefs and business model.

A vulnerability is defined in the ISO 27002 standard as “A weakness of an asset or group of assets that can be exploited by one or more threats” (International Organization for Standardization, 2005)

We generate revenue by providing support and other services for customers that require a subscription so they get guaranteed support and enterprise services. To use Mageni's Platform is completely free, with no limits at all.

Yes. Mageni understands that there are professionals and businesses that need commercial support so Mageni provides an active support subscription with everything needed to run Mageni's Platform reliably and securely. More than software, it's access to security experts, knowledge resources, security updates, and support tools you can't get anywhere else. The subscription includes:

  • Ongoing delivery
    • Patches
    • Bug fixes
    • Updates
    • Upgrades
  • Technical support
    • 24/7 availability
    • Unlimited Incidents
    • Specialty-based routing
    • Multi-Channel
  • Commitments
    • Software certifications
    • Software assurance
    • SLA

No, we don't store the information of your vulnerabilities in our servers.

Vulnerability management is the process in which vulnerabilities in IT are identified and the risks of these vulnerabilities are evaluated. This evaluation leads to correcting the vulnerabilities and removing the risk or a formal risk acceptance by the management of an organization. The term vulnerability management is often confused with vulnerability scanning. Despite the fact both are related, there is an important difference between the two. Vulnerability scanning consists of using a computer program to identify vulnerabilities in networks, computer infrastructure or applications. Vulnerability management is the process surrounding vulnerability scanning, also taking into account other aspects such as risk acceptance, remediation etc. Source: "Implementing a Vulnerability Management Process". SANS Institute.

I am ready to start scanning for vulnerabilities