Amazon Linux AMI update for kernel



Risk Low
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2023-3609
CVE-2023-3611
CVE-2023-3776
CWE-ID CWE-416
CWE-787
Exploitation vector Local
Public exploit N/A
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 3 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU78941

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-2023-3609

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: cls_u32 component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected packages:

i686:
    kernel-tools-debuginfo-4.14.320-169.544.amzn1.i686
    kernel-4.14.320-169.544.amzn1.i686
    kernel-headers-4.14.320-169.544.amzn1.i686
    perf-debuginfo-4.14.320-169.544.amzn1.i686
    kernel-debuginfo-4.14.320-169.544.amzn1.i686
    kernel-tools-devel-4.14.320-169.544.amzn1.i686
    kernel-devel-4.14.320-169.544.amzn1.i686
    kernel-tools-4.14.320-169.544.amzn1.i686
    perf-4.14.320-169.544.amzn1.i686
    kernel-debuginfo-common-i686-4.14.320-169.544.amzn1.i686

src:
    kernel-4.14.320-169.544.amzn1.src

x86_64:
    kernel-4.14.320-169.544.amzn1.x86_64
    kernel-headers-4.14.320-169.544.amzn1.x86_64
    kernel-devel-4.14.320-169.544.amzn1.x86_64
    kernel-debuginfo-4.14.320-169.544.amzn1.x86_64
    perf-4.14.320-169.544.amzn1.x86_64
    perf-debuginfo-4.14.320-169.544.amzn1.x86_64
    kernel-tools-debuginfo-4.14.320-169.544.amzn1.x86_64
    kernel-tools-devel-4.14.320-169.544.amzn1.x86_64
    kernel-tools-4.14.320-169.544.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.320-169.544.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2023-1792.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) Out-of-bounds write

EUVDB-ID: #VU78943

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-2023-3611

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

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in the qfq_change_agg() function in net/sched/sch_qfq.c within the Linux kernel net/sched: sch_qfq component. A local user trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Update the affected packages:

i686:
    kernel-tools-debuginfo-4.14.320-169.544.amzn1.i686
    kernel-4.14.320-169.544.amzn1.i686
    kernel-headers-4.14.320-169.544.amzn1.i686
    perf-debuginfo-4.14.320-169.544.amzn1.i686
    kernel-debuginfo-4.14.320-169.544.amzn1.i686
    kernel-tools-devel-4.14.320-169.544.amzn1.i686
    kernel-devel-4.14.320-169.544.amzn1.i686
    kernel-tools-4.14.320-169.544.amzn1.i686
    perf-4.14.320-169.544.amzn1.i686
    kernel-debuginfo-common-i686-4.14.320-169.544.amzn1.i686

src:
    kernel-4.14.320-169.544.amzn1.src

x86_64:
    kernel-4.14.320-169.544.amzn1.x86_64
    kernel-headers-4.14.320-169.544.amzn1.x86_64
    kernel-devel-4.14.320-169.544.amzn1.x86_64
    kernel-debuginfo-4.14.320-169.544.amzn1.x86_64
    perf-4.14.320-169.544.amzn1.x86_64
    perf-debuginfo-4.14.320-169.544.amzn1.x86_64
    kernel-tools-debuginfo-4.14.320-169.544.amzn1.x86_64
    kernel-tools-devel-4.14.320-169.544.amzn1.x86_64
    kernel-tools-4.14.320-169.544.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.320-169.544.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2023-1792.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) Use-after-free

EUVDB-ID: #VU79285

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-2023-3776

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's net/sched: cls_fw component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected packages:

i686:
    kernel-tools-debuginfo-4.14.320-169.544.amzn1.i686
    kernel-4.14.320-169.544.amzn1.i686
    kernel-headers-4.14.320-169.544.amzn1.i686
    perf-debuginfo-4.14.320-169.544.amzn1.i686
    kernel-debuginfo-4.14.320-169.544.amzn1.i686
    kernel-tools-devel-4.14.320-169.544.amzn1.i686
    kernel-devel-4.14.320-169.544.amzn1.i686
    kernel-tools-4.14.320-169.544.amzn1.i686
    perf-4.14.320-169.544.amzn1.i686
    kernel-debuginfo-common-i686-4.14.320-169.544.amzn1.i686

src:
    kernel-4.14.320-169.544.amzn1.src

x86_64:
    kernel-4.14.320-169.544.amzn1.x86_64
    kernel-headers-4.14.320-169.544.amzn1.x86_64
    kernel-devel-4.14.320-169.544.amzn1.x86_64
    kernel-debuginfo-4.14.320-169.544.amzn1.x86_64
    perf-4.14.320-169.544.amzn1.x86_64
    perf-debuginfo-4.14.320-169.544.amzn1.x86_64
    kernel-tools-debuginfo-4.14.320-169.544.amzn1.x86_64
    kernel-tools-devel-4.14.320-169.544.amzn1.x86_64
    kernel-tools-4.14.320-169.544.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.320-169.544.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2023-1792.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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