Debian LTS: Security Advisory for linux (DLA-2420-1)

Published: 2020-10-31 04:00:34
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:

The remote host is missing an update for the 'linux' Linux Distribution Package(s) announced via the DLA-2420-1 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 the execution of arbitrary code, privilege escalation, denial of service or information leaks. CVE-2019-9445 A potential out-of-bounds read was discovered in the F2FS implementation. A user permitted to mount and access arbitrary filesystems could potentially use this to cause a denial of service (crash) or to read sensitive information. CVE-2019-19073, CVE-2019-19074 Navid Emamdoost discovered potential memory leaks in the ath9k and ath9k_htc drivers. The security impact of these is unclear. CVE-2019-19448 'Team bobfuzzer' reported a bug in Btrfs that could lead to a use-after-free, and could be triggered by crafted filesystem images. A user permitted to mount and access arbitrary filesystems could use this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2020-12351 Andy Nguyen discovered a flaw in the Bluetooth implementation in the way L2CAP packets with A2MP CID are handled. A remote attacker within a short distance, knowing the victim's Bluetooth device address, can send a malicious l2cap packet and cause a denial of service or possibly arbitrary code execution with kernel privileges. CVE-2020-12352 Andy Nguyen discovered a flaw in the Bluetooth implementation. Stack memory is not properly initialised when handling certain AMP packets. A remote attacker within a short distance, knowing the victim's Bluetooth device address address, can retrieve kernel stack information. CVE-2020-12655 Zheng Bin reported that crafted XFS volumes could trigger a system hang. An attacker able to mount such a volume could use this to cause a denial of service. CVE-2020-12771 Zhiqiang Liu reported a bug in the bcache block driver that could lead to a system hang. The security impact of this is unclear. CVE-2020-12888 It was discovered that the PCIe Virtual Function I/O (vfio-pci) driver allowed users to disable a device's memory space while it was still mapped into a process. On some hardware platforms, local users or guest virtual machines permitted to access PCIe Virtual Functions could use this to cause a denial of service (hardware error and crash). CVE-2020-14305 Vasily Averin of Virtuozzo discovered a potential heap buffer overflow in the netfilter nf_contrack_h323 module. When this module is used to perform connection tracking for TCP/IPv6, a remote attacker could use this to cause a denial of service (crash or memory corruption) or possibly for remote code execution with kernel privilege. CVE-2020-14314 A bug was discovered in the ext4 filesystem that could lead to an out ... Description truncated. Please see the references for more information.

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

For Debian 9 stretch, these problems have been fixed in version 4.9.240-1. This update additionally includes many more bug fixes from stable updates 4.9.229-4.9.240 inclusive. 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)


CVSS Score
Debian Local Security Checks

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