Amazon Linux AMI : kernel (ALAS-2019-1201)
medium Nessus Plugin ID 124654
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Synopsis
The remote Amazon Linux AMI host is missing a security update.Description
A flaw was found in the Linux kernel's implementation of logical link control and adaptation protocol (L2CAP), part of the Bluetooth stack in the l2cap_parse_conf_rsp and l2cap_parse_conf_req functions. An attacker with physical access within the range of standard Bluetooth transmission can create a specially crafted packet. The response to this specially crafted packet can contain part of the kernel stack which can be used in a further attack. (CVE-2019-3460)A bypass was found for the Spectre v1 hardening in the eBPF engine of the Linux kernel. The code in the kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic in various cases, including cases of different branches with different state or limits to sanitize, leading to side-channel attacks. (CVE-2019-7308)
A flaw was found in the Linux kernels implementation of Logical link control and adaptation protocol (L2CAP), part of the Bluetooth stack.
An attacker with physical access within the range of standard Bluetooth transmission can create a specially crafted packet. The response to this specially crafted packet can contain part of the kernel stack which can be used in a further attack. (CVE-2019-3459)
Solution
Run 'yum update kernel' to update your system.See Also
Plugin Details
Severity: Medium
ID: 124654
File Name: ala_ALAS-2019-1201.nasl
Version: 1.3
Type: local
Agent: unix
Published: 5/7/2019
Updated: 1/21/2020
Dependencies: ssh_get_info.nasl
Risk Information
CVSS Score Source: CVE-2019-7308
VPR
Risk Factor: Medium
Score: 5.2
CVSS v2
Risk Factor: Medium
Base Score: 4.7
Temporal Score: 3.7
Vector: AV:L/AC:M/Au:N/C:C/I:N/A:N
Temporal Vector: E:POC/RL:OF/RC:C
CVSS v3
Risk Factor: Medium
Base Score: 5.6
Temporal Score: 5.1
Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Temporal Vector: E:P/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:kernel, p-cpe:/a:amazon:linux:kernel-debuginfo, p-cpe:/a:amazon:linux:kernel-debuginfo-common-i686, p-cpe:/a:amazon:linux:kernel-debuginfo-common-x86_64, p-cpe:/a:amazon:linux:kernel-devel, p-cpe:/a:amazon:linux:kernel-headers, p-cpe:/a:amazon:linux:kernel-tools, p-cpe:/a:amazon:linux:kernel-tools-debuginfo, p-cpe:/a:amazon:linux:kernel-tools-devel, p-cpe:/a:amazon:linux:perf, p-cpe:/a:amazon:linux:perf-debuginfo, cpe:/o:amazon:linux
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 5/6/2019
Vulnerability Publication Date: 2/1/2019
Reference Information
ALAS: 2019-1201