Amazon Linux AMI update for kernel-livepatch

Published: 2024-08-06

Risk	High
Patch available	YES
Number of vulnerabilities	7
CVE-ID	CVE-2023-42752 CVE-2023-45871 CVE-2023-4623 CVE-2023-4921 CVE-2023-5090 CVE-2023-5197 CVE-2023-5717
CWE-ID	CWE-190 CWE-119 CWE-416 CWE-755 CWE-787
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system kernel-livepatch Operating systems & Components / Operating system package or component
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 7 vulnerabilities.

1) Integer overflow

EUVDB-ID: #VU80877

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-42752

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow within the __alloc_skb() function. A local user can trigger integer overflow and crash the kernel.

Mitigation

Update the affected packages:

aarch64:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.aarch64

src:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.src

x86_64:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel-livepatch: before 6.1.49-69.116-1.0-2

External links

http://alas.aws.amazon.com/AL2023/ALASLIVEPATCH-2023-025.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.

2) Buffer overflow

EUVDB-ID: #VU83381

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-45871

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the IGB driver in drivers/net/ethernet/intel/igb/igb_main.c when handling frames larger than the MTU. A remote attacker can send specially crafted traffic to the system, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages:

aarch64:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.aarch64

src:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.src

x86_64:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel-livepatch: before 6.1.49-69.116-1.0-2

External links

http://alas.aws.amazon.com/AL2023/ALASLIVEPATCH-2023-025.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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

3) Use-after-free

EUVDB-ID: #VU81664

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-4623

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within the the Linux kernel net/sched: sch_hfsc (HFSC qdisc traffic control) component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected packages:

aarch64:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.aarch64

src:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.src

x86_64:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel-livepatch: before 6.1.49-69.116-1.0-2

External links

http://alas.aws.amazon.com/AL2023/ALASLIVEPATCH-2023-025.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) Use-after-free

EUVDB-ID: #VU81693

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-4921

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in the qfq_dequeue() function within the the Linux kernel's net/sched: sch_qfq component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected packages:

aarch64:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.aarch64

src:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.src

x86_64:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel-livepatch: before 6.1.49-69.116-1.0-2

External links

http://alas.aws.amazon.com/AL2023/ALASLIVEPATCH-2023-025.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.

5) Improper handling of exceptional conditions

EUVDB-ID: #VU83383

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

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:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.aarch64

src:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.src

x86_64:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel-livepatch: before 6.1.49-69.116-1.0-2

External links

http://alas.aws.amazon.com/AL2023/ALASLIVEPATCH-2023-025.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.

6) Use-after-free

EUVDB-ID: #VU82304

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-5197

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within Linux kernel netfilter: nf_tables component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected packages:

aarch64:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.aarch64

src:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.src

x86_64:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel-livepatch: before 6.1.49-69.116-1.0-2

External links

http://alas.aws.amazon.com/AL2023/ALASLIVEPATCH-2023-025.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.

7) Out-of-bounds write

EUVDB-ID: #VU83311

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

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:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.aarch64

src:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.src

x86_64:
    kernel-livepatch-6.1.49-69.116-1.0-2.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel-livepatch: before 6.1.49-69.116-1.0-2

External links

http://alas.aws.amazon.com/AL2023/ALASLIVEPATCH-2023-025.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.