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Amazon Linux 2022 : (ALAS2022-2022-083)
high Nessus Plugin ID 164723
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Synopsis
The remote Amazon Linux 2022 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2022-2022-083 advisory.- A flaw was found in unrestricted eBPF usage by the BPF_BTF_LOAD, leading to a possible out-of-bounds memory write in the Linux kernel's BPF subsystem due to the way a user loads BTF. This flaw allows a local user to crash or escalate their privileges on the system. (CVE-2022-0500)
- A flaw was found in the Linux kernel in linux/net/netfilter/nf_tables_api.c of the netfilter subsystem.
This flaw allows a local user to cause an out-of-bounds write issue. (CVE-2022-1015)
- A flaw was found in the Linux kernel in net/netfilter/nf_tables_core.c:nft_do_chain, which can cause a use-after-free. This issue needs to handle 'return' with proper preconditions, as it can lead to a kernel information leak problem caused by a local, unprivileged attacker. (CVE-2022-1016)
- A flaw was found in KVM. When updating a guest's page table entry, vm_pgoff was improperly used as the offset to get the page's pfn. As vaddr and vm_pgoff are controllable by user-mode processes, this flaw allows unprivileged local users on the host to write outside the userspace region and potentially corrupt the kernel, resulting in a denial of service condition. (CVE-2022-1158)
- A NULL pointer dereference issue was found in KVM when releasing a vCPU with dirty ring support enabled.
This flaw allows an unprivileged local attacker on the host to issue specific ioctl calls, causing a kernel oops condition that results in a denial of service. (CVE-2022-1263)
- A vulnerability was found in the pfkey_register function in net/key/af_key.c in the Linux kernel. This flaw allows a local, unprivileged user to gain access to kernel memory, leading to a system crash or a leak of internal kernel information. (CVE-2022-1353)
- A race condition was found the Linux kernel in perf_event_open() which can be exploited by an unprivileged user to gain root privileges. The bug allows to build several exploit primitives such as kernel address information leak, arbitrary execution, etc. (CVE-2022-1729)
- kernel/bpf/verifier.c in the Linux kernel through 5.15.14 allows local users to gain privileges because of the availability of pointer arithmetic via certain *_OR_NULL pointer types. (CVE-2022-23222)
- The SUNRPC subsystem in the Linux kernel through 5.17.2 can call xs_xprt_free before ensuring that sockets are in the intended state. (CVE-2022-28893)
- Improper Update of Reference Count vulnerability in net/sched of Linux Kernel allows local attacker to cause privilege escalation to root. This issue affects: Linux Kernel versions prior to 5.18; version 4.14 and later versions. (CVE-2022-29581)
- In the Linux kernel before 5.17.3, fs/io_uring.c has a use-after-free due to a race condition in io_uring timeouts. This can be triggered by a local user who has no access to any user namespace; however, the race condition perhaps can only be exploited infrequently. (CVE-2022-29582)
- The Linux kernel before 5.17.2 mishandles seccomp permissions. The PTRACE_SEIZE code path allows attackers to bypass intended restrictions on setting the PT_SUSPEND_SECCOMP flag. (CVE-2022-30594)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Run 'dnf update --releasever=2022.0.20220518 kernel' to update your system.See Also
https://alas.aws.amazon.com/AL2022/ALAS-2022-083.html
https://alas.aws.amazon.com/cve/html/CVE-2022-0500.html
https://alas.aws.amazon.com/cve/html/CVE-2022-1015.html
https://alas.aws.amazon.com/cve/html/CVE-2022-1016.html
https://alas.aws.amazon.com/cve/html/CVE-2022-1158.html
https://alas.aws.amazon.com/cve/html/CVE-2022-1263.html
https://alas.aws.amazon.com/cve/html/CVE-2022-1353.html
https://alas.aws.amazon.com/cve/html/CVE-2022-1729.html
https://alas.aws.amazon.com/cve/html/CVE-2022-23222.html
https://alas.aws.amazon.com/cve/html/CVE-2022-28893.html
https://alas.aws.amazon.com/cve/html/CVE-2022-29581.html
Plugin Details
Severity: High
ID: 164723
File Name: al2022_ALAS2022-2022-083.nasl
Version: 1.4
Type: local
Agent: unix
Published: 9/6/2022
Updated: 1/13/2023
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.4
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 6
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2022-29581
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 7.2
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C
CVSS Score Source: CVE-2022-30594
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:perf, p-cpe:/a:amazon:linux:bpftool, p-cpe:/a:amazon:linux:perf-debuginfo, p-cpe:/a:amazon:linux:kernel-tools-debuginfo, p-cpe:/a:amazon:linux:kernel-livepatch-5.15.43-20.123, p-cpe:/a:amazon:linux:kernel-debuginfo-common-aarch64, p-cpe:/a:amazon:linux:kernel-tools, p-cpe:/a:amazon:linux:kernel-devel, p-cpe:/a:amazon:linux:python3-perf, cpe:/o:amazon:linux:2022, p-cpe:/a:amazon:linux:kernel, p-cpe:/a:amazon:linux:kernel-debuginfo, p-cpe:/a:amazon:linux:kernel-headers, p-cpe:/a:amazon:linux:python3-perf-debuginfo, p-cpe:/a:amazon:linux:bpftool-debuginfo, p-cpe:/a:amazon:linux:kernel-tools-devel, p-cpe:/a:amazon:linux:kernel-debuginfo-common-x86_64
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: 6/1/2022
Vulnerability Publication Date: 1/14/2022
Exploitable With
Core Impact
Reference Information
CVE: CVE-2022-0500, CVE-2022-1015, CVE-2022-1016, CVE-2022-1158, CVE-2022-1263, CVE-2022-1353, CVE-2022-1729, CVE-2022-23222, CVE-2022-28893, CVE-2022-29581, CVE-2022-29582, CVE-2022-30594