Debian LTS: Security Advisory for linux-4.19 (DLA-2714-1)

Published: 2021-07-21 03:00:20
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:

The remote host is missing an update for the 'linux-4.19' Linux Distribution Package(s) announced via the DLA-2714-1 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. This update is not yet available for the armhf (ARM EABI hard-float) architecture. CVE-2020-36311 A flaw was discovered in the KVM subsystem for AMD CPUs, allowing an attacker to cause a denial of service by triggering destruction of a large SEV VM. CVE-2021-3609 Norbert Slusarek reported a race condition vulnerability in the CAN BCM networking protocol, allowing a local attacker to escalate privileges. CVE-2021-33909 The Qualys Research Labs discovered a size_t-to-int conversion vulnerability in the Linux kernel's filesystem layer. An unprivileged local attacker able to create, mount, and then delete a deep directory structure whose total path length exceeds 1GB, can take advantage of this flaw for privilege escalation. Details can be found in the Qualys advisory at [link moved to references] CVE-2021-34693 Norbert Slusarek discovered an information leak in the CAN BCM networking protocol. A local attacker can take advantage of this flaw to obtain sensitive information from kernel stack memory.

Affected Versions:
'linux-4.19' Linux Distribution Package(s) on Debian Linux.

For Debian 9 stretch, these problems have been fixed in version 4.19.194-3~deb9u1. This additionally fixes a regression in the previous update (#990072) that affected LXC. We recommend that you upgrade your linux-4.19 Linux Distribution Packages.

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

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


CVSS Score
Debian Local Security Checks

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