Amazon Linux AMI update for kernel



Risk Low
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2023-46813
CVE-2023-46862
CVE-2023-5090
CVE-2023-5717
CWE-ID CWE-284
CWE-476
CWE-755
CWE-787
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 Amazon Linux AMI
Operating systems & Components / Operating system

kernel
Operating systems & Components / Operating system package or component

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Improper access control

EUVDB-ID: #VU82764

Risk: Low

CVSSv4.0: 7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2023-46813

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: Yes

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper access checking in the #VC handler and instruction emulation of the SEV-ES emulation of MMIO accesses. A local user can gain arbitrary write access to kernel memory and execute arbitrary code with elevated privileges.

Mitigation

Update the affected packages:

aarch64:
    perf-debuginfo-6.1.61-85.141.amzn2023.aarch64
    kernel-livepatch-6.1.61-85.141-1.0-0.amzn2023.aarch64
    kernel-tools-debuginfo-6.1.61-85.141.amzn2023.aarch64
    bpftool-debuginfo-6.1.61-85.141.amzn2023.aarch64
    bpftool-6.1.61-85.141.amzn2023.aarch64
    kernel-tools-6.1.61-85.141.amzn2023.aarch64
    python3-perf-debuginfo-6.1.61-85.141.amzn2023.aarch64
    perf-6.1.61-85.141.amzn2023.aarch64
    python3-perf-6.1.61-85.141.amzn2023.aarch64
    kernel-libbpf-devel-6.1.61-85.141.amzn2023.aarch64
    kernel-libbpf-6.1.61-85.141.amzn2023.aarch64
    kernel-tools-devel-6.1.61-85.141.amzn2023.aarch64
    kernel-libbpf-static-6.1.61-85.141.amzn2023.aarch64
    kernel-modules-extra-6.1.61-85.141.amzn2023.aarch64
    kernel-debuginfo-6.1.61-85.141.amzn2023.aarch64
    kernel-headers-6.1.61-85.141.amzn2023.aarch64
    kernel-6.1.61-85.141.amzn2023.aarch64
    kernel-debuginfo-common-aarch64-6.1.61-85.141.amzn2023.aarch64
    kernel-devel-6.1.61-85.141.amzn2023.aarch64

src:
    kernel-6.1.61-85.141.amzn2023.src

x86_64:
    python3-perf-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-livepatch-6.1.61-85.141-1.0-0.amzn2023.x86_64
    kernel-tools-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-libbpf-6.1.61-85.141.amzn2023.x86_64
    bpftool-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-modules-extra-6.1.61-85.141.amzn2023.x86_64
    kernel-libbpf-devel-6.1.61-85.141.amzn2023.x86_64
    kernel-tools-6.1.61-85.141.amzn2023.x86_64
    kernel-tools-devel-6.1.61-85.141.amzn2023.x86_64
    perf-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-libbpf-static-6.1.61-85.141.amzn2023.x86_64
    perf-6.1.61-85.141.amzn2023.x86_64
    python3-perf-6.1.61-85.141.amzn2023.x86_64
    bpftool-6.1.61-85.141.amzn2023.x86_64
    kernel-headers-6.1.61-85.141.amzn2023.x86_64
    kernel-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-6.1.61-85.141.amzn2023.x86_64
    kernel-debuginfo-common-x86_64-6.1.61-85.141.amzn2023.x86_64
    kernel-devel-6.1.61-85.141.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: All versions

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-430.html


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) NULL pointer dereference

EUVDB-ID: #VU83903

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-46862

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the io_uring_show_fdinfo() function in io_uring/fdinfo.c. A local user can trigger a race with SQ thread exit and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

aarch64:
    perf-debuginfo-6.1.61-85.141.amzn2023.aarch64
    kernel-livepatch-6.1.61-85.141-1.0-0.amzn2023.aarch64
    kernel-tools-debuginfo-6.1.61-85.141.amzn2023.aarch64
    bpftool-debuginfo-6.1.61-85.141.amzn2023.aarch64
    bpftool-6.1.61-85.141.amzn2023.aarch64
    kernel-tools-6.1.61-85.141.amzn2023.aarch64
    python3-perf-debuginfo-6.1.61-85.141.amzn2023.aarch64
    perf-6.1.61-85.141.amzn2023.aarch64
    python3-perf-6.1.61-85.141.amzn2023.aarch64
    kernel-libbpf-devel-6.1.61-85.141.amzn2023.aarch64
    kernel-libbpf-6.1.61-85.141.amzn2023.aarch64
    kernel-tools-devel-6.1.61-85.141.amzn2023.aarch64
    kernel-libbpf-static-6.1.61-85.141.amzn2023.aarch64
    kernel-modules-extra-6.1.61-85.141.amzn2023.aarch64
    kernel-debuginfo-6.1.61-85.141.amzn2023.aarch64
    kernel-headers-6.1.61-85.141.amzn2023.aarch64
    kernel-6.1.61-85.141.amzn2023.aarch64
    kernel-debuginfo-common-aarch64-6.1.61-85.141.amzn2023.aarch64
    kernel-devel-6.1.61-85.141.amzn2023.aarch64

src:
    kernel-6.1.61-85.141.amzn2023.src

x86_64:
    python3-perf-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-livepatch-6.1.61-85.141-1.0-0.amzn2023.x86_64
    kernel-tools-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-libbpf-6.1.61-85.141.amzn2023.x86_64
    bpftool-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-modules-extra-6.1.61-85.141.amzn2023.x86_64
    kernel-libbpf-devel-6.1.61-85.141.amzn2023.x86_64
    kernel-tools-6.1.61-85.141.amzn2023.x86_64
    kernel-tools-devel-6.1.61-85.141.amzn2023.x86_64
    perf-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-libbpf-static-6.1.61-85.141.amzn2023.x86_64
    perf-6.1.61-85.141.amzn2023.x86_64
    python3-perf-6.1.61-85.141.amzn2023.x86_64
    bpftool-6.1.61-85.141.amzn2023.x86_64
    kernel-headers-6.1.61-85.141.amzn2023.x86_64
    kernel-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-6.1.61-85.141.amzn2023.x86_64
    kernel-debuginfo-common-x86_64-6.1.61-85.141.amzn2023.x86_64
    kernel-devel-6.1.61-85.141.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: All versions

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-430.html


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Improper handling of exceptional conditions

EUVDB-ID: #VU83383

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-5090

CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper handling of errors within the svm_set_x2apic_msr_interception() function in KVM. A local user can send specially crafted input and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

aarch64:
    perf-debuginfo-6.1.61-85.141.amzn2023.aarch64
    kernel-livepatch-6.1.61-85.141-1.0-0.amzn2023.aarch64
    kernel-tools-debuginfo-6.1.61-85.141.amzn2023.aarch64
    bpftool-debuginfo-6.1.61-85.141.amzn2023.aarch64
    bpftool-6.1.61-85.141.amzn2023.aarch64
    kernel-tools-6.1.61-85.141.amzn2023.aarch64
    python3-perf-debuginfo-6.1.61-85.141.amzn2023.aarch64
    perf-6.1.61-85.141.amzn2023.aarch64
    python3-perf-6.1.61-85.141.amzn2023.aarch64
    kernel-libbpf-devel-6.1.61-85.141.amzn2023.aarch64
    kernel-libbpf-6.1.61-85.141.amzn2023.aarch64
    kernel-tools-devel-6.1.61-85.141.amzn2023.aarch64
    kernel-libbpf-static-6.1.61-85.141.amzn2023.aarch64
    kernel-modules-extra-6.1.61-85.141.amzn2023.aarch64
    kernel-debuginfo-6.1.61-85.141.amzn2023.aarch64
    kernel-headers-6.1.61-85.141.amzn2023.aarch64
    kernel-6.1.61-85.141.amzn2023.aarch64
    kernel-debuginfo-common-aarch64-6.1.61-85.141.amzn2023.aarch64
    kernel-devel-6.1.61-85.141.amzn2023.aarch64

src:
    kernel-6.1.61-85.141.amzn2023.src

x86_64:
    python3-perf-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-livepatch-6.1.61-85.141-1.0-0.amzn2023.x86_64
    kernel-tools-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-libbpf-6.1.61-85.141.amzn2023.x86_64
    bpftool-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-modules-extra-6.1.61-85.141.amzn2023.x86_64
    kernel-libbpf-devel-6.1.61-85.141.amzn2023.x86_64
    kernel-tools-6.1.61-85.141.amzn2023.x86_64
    kernel-tools-devel-6.1.61-85.141.amzn2023.x86_64
    perf-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-libbpf-static-6.1.61-85.141.amzn2023.x86_64
    perf-6.1.61-85.141.amzn2023.x86_64
    python3-perf-6.1.61-85.141.amzn2023.x86_64
    bpftool-6.1.61-85.141.amzn2023.x86_64
    kernel-headers-6.1.61-85.141.amzn2023.x86_64
    kernel-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-6.1.61-85.141.amzn2023.x86_64
    kernel-debuginfo-common-x86_64-6.1.61-85.141.amzn2023.x86_64
    kernel-devel-6.1.61-85.141.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: All versions

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-430.html


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Out-of-bounds write

EUVDB-ID: #VU83311

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-5717

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in the Linux kernel's Linux Kernel Performance Events (perf) component. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Update the affected packages:

aarch64:
    perf-debuginfo-6.1.61-85.141.amzn2023.aarch64
    kernel-livepatch-6.1.61-85.141-1.0-0.amzn2023.aarch64
    kernel-tools-debuginfo-6.1.61-85.141.amzn2023.aarch64
    bpftool-debuginfo-6.1.61-85.141.amzn2023.aarch64
    bpftool-6.1.61-85.141.amzn2023.aarch64
    kernel-tools-6.1.61-85.141.amzn2023.aarch64
    python3-perf-debuginfo-6.1.61-85.141.amzn2023.aarch64
    perf-6.1.61-85.141.amzn2023.aarch64
    python3-perf-6.1.61-85.141.amzn2023.aarch64
    kernel-libbpf-devel-6.1.61-85.141.amzn2023.aarch64
    kernel-libbpf-6.1.61-85.141.amzn2023.aarch64
    kernel-tools-devel-6.1.61-85.141.amzn2023.aarch64
    kernel-libbpf-static-6.1.61-85.141.amzn2023.aarch64
    kernel-modules-extra-6.1.61-85.141.amzn2023.aarch64
    kernel-debuginfo-6.1.61-85.141.amzn2023.aarch64
    kernel-headers-6.1.61-85.141.amzn2023.aarch64
    kernel-6.1.61-85.141.amzn2023.aarch64
    kernel-debuginfo-common-aarch64-6.1.61-85.141.amzn2023.aarch64
    kernel-devel-6.1.61-85.141.amzn2023.aarch64

src:
    kernel-6.1.61-85.141.amzn2023.src

x86_64:
    python3-perf-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-livepatch-6.1.61-85.141-1.0-0.amzn2023.x86_64
    kernel-tools-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-libbpf-6.1.61-85.141.amzn2023.x86_64
    bpftool-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-modules-extra-6.1.61-85.141.amzn2023.x86_64
    kernel-libbpf-devel-6.1.61-85.141.amzn2023.x86_64
    kernel-tools-6.1.61-85.141.amzn2023.x86_64
    kernel-tools-devel-6.1.61-85.141.amzn2023.x86_64
    perf-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-libbpf-static-6.1.61-85.141.amzn2023.x86_64
    perf-6.1.61-85.141.amzn2023.x86_64
    python3-perf-6.1.61-85.141.amzn2023.x86_64
    bpftool-6.1.61-85.141.amzn2023.x86_64
    kernel-headers-6.1.61-85.141.amzn2023.x86_64
    kernel-debuginfo-6.1.61-85.141.amzn2023.x86_64
    kernel-6.1.61-85.141.amzn2023.x86_64
    kernel-debuginfo-common-x86_64-6.1.61-85.141.amzn2023.x86_64
    kernel-devel-6.1.61-85.141.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: All versions

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-430.html


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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