Amazon Linux AMI update for kernel



Published: 2022-10-11 | Updated: 2024-03-20
Risk Medium
Patch available YES
Number of vulnerabilities 12
CVE-ID CVE-2021-33655
CVE-2021-4159
CVE-2022-1462
CVE-2022-1679
CVE-2022-2153
CVE-2022-2588
CVE-2022-2663
CVE-2022-3028
CVE-2022-36123
CVE-2022-36879
CVE-2022-36946
CVE-2022-40307
CWE-ID CWE-787
CWE-401
CWE-125
CWE-416
CWE-476
CWE-415
CWE-20
CWE-362
CWE-264
CWE-399
Exploitation vector Network
Public exploit Vulnerability #6 is being exploited in the wild.
Public exploit code for vulnerability #11 is available.
Vulnerable software
Subscribe 		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 12 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU65833

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-2021-33655

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 FBIOPUT_VSCREENINFO IOCTL. A local user can trigger an out-of-bounds write error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected packages:

i686:
    kernel-devel-4.14.294-150.533.amzn1.i686
    kernel-4.14.294-150.533.amzn1.i686
    perf-debuginfo-4.14.294-150.533.amzn1.i686
    perf-4.14.294-150.533.amzn1.i686
    kernel-tools-devel-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-common-i686-4.14.294-150.533.amzn1.i686
    kernel-headers-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-4.14.294-150.533.amzn1.i686
    kernel-tools-4.14.294-150.533.amzn1.i686
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.i686

src:
    kernel-4.14.294-150.533.amzn1.src

x86_64:
    perf-4.14.294-150.533.amzn1.x86_64
    kernel-headers-4.14.294-150.533.amzn1.x86_64
    perf-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-devel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-4.14.294-150.533.amzn1.x86_64
    kernel-devel-4.14.294-150.533.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: before 4.14.294-150.533

External links

http://alas.aws.amazon.com/ALAS-2022-1636.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) Memory leak

EUVDB-ID: #VU67913

Risk: Low

CVSSv3.1: 3.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-4159

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due memory leak in Linux kernel EBPF verifier when handling internal data structures. A local user with permissions to insert eBPF code to the kernel can force the kernel to leak internal kernel memory details and bypass mitigations, related to exploitation protection.

Mitigation

Update the affected packages:

i686:
    kernel-devel-4.14.294-150.533.amzn1.i686
    kernel-4.14.294-150.533.amzn1.i686
    perf-debuginfo-4.14.294-150.533.amzn1.i686
    perf-4.14.294-150.533.amzn1.i686
    kernel-tools-devel-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-common-i686-4.14.294-150.533.amzn1.i686
    kernel-headers-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-4.14.294-150.533.amzn1.i686
    kernel-tools-4.14.294-150.533.amzn1.i686
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.i686

src:
    kernel-4.14.294-150.533.amzn1.src

x86_64:
    perf-4.14.294-150.533.amzn1.x86_64
    kernel-headers-4.14.294-150.533.amzn1.x86_64
    perf-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-devel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-4.14.294-150.533.amzn1.x86_64
    kernel-devel-4.14.294-150.533.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: before 4.14.294-150.533

External links

http://alas.aws.amazon.com/ALAS-2022-1636.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) Out-of-bounds read

EUVDB-ID: #VU66591

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-1462

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition within the the Linux kernel’s TeleTYpe subsystem caused by a race condition when using ioctls TIOCSPTLCK and TIOCGPTPEER and TIOCSTI and TCXONC with leakage of memory file. A local user can trigger an out-of-bounds read error and crash the system or read random kernel memory.

Mitigation

Update the affected packages:

i686:
    kernel-devel-4.14.294-150.533.amzn1.i686
    kernel-4.14.294-150.533.amzn1.i686
    perf-debuginfo-4.14.294-150.533.amzn1.i686
    perf-4.14.294-150.533.amzn1.i686
    kernel-tools-devel-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-common-i686-4.14.294-150.533.amzn1.i686
    kernel-headers-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-4.14.294-150.533.amzn1.i686
    kernel-tools-4.14.294-150.533.amzn1.i686
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.i686

src:
    kernel-4.14.294-150.533.amzn1.src

x86_64:
    perf-4.14.294-150.533.amzn1.x86_64
    kernel-headers-4.14.294-150.533.amzn1.x86_64
    perf-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-devel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-4.14.294-150.533.amzn1.x86_64
    kernel-devel-4.14.294-150.533.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: before 4.14.294-150.533

External links

http://alas.aws.amazon.com/ALAS-2022-1636.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: #VU64861

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-2022-1679

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 ath9k_htc_wait_for_target() function in the Linux kernel’s Atheros wireless adapter driver. A local user can execute arbitrary code with elevated privileges.

Mitigation

Update the affected packages:

i686:
    kernel-devel-4.14.294-150.533.amzn1.i686
    kernel-4.14.294-150.533.amzn1.i686
    perf-debuginfo-4.14.294-150.533.amzn1.i686
    perf-4.14.294-150.533.amzn1.i686
    kernel-tools-devel-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-common-i686-4.14.294-150.533.amzn1.i686
    kernel-headers-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-4.14.294-150.533.amzn1.i686
    kernel-tools-4.14.294-150.533.amzn1.i686
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.i686

src:
    kernel-4.14.294-150.533.amzn1.src

x86_64:
    perf-4.14.294-150.533.amzn1.x86_64
    kernel-headers-4.14.294-150.533.amzn1.x86_64
    perf-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-devel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-4.14.294-150.533.amzn1.x86_64
    kernel-devel-4.14.294-150.533.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: before 4.14.294-150.533

External links

http://alas.aws.amazon.com/ALAS-2022-1636.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) NULL pointer dereference

EUVDB-ID: #VU64920

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-2022-2153

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 in the Linux kernel’s KVM when attempting to set a SynIC IRQ. A local user on the host can issue specific ioctl calls, causing a denial of service.

Mitigation

Update the affected packages:

i686:
    kernel-devel-4.14.294-150.533.amzn1.i686
    kernel-4.14.294-150.533.amzn1.i686
    perf-debuginfo-4.14.294-150.533.amzn1.i686
    perf-4.14.294-150.533.amzn1.i686
    kernel-tools-devel-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-common-i686-4.14.294-150.533.amzn1.i686
    kernel-headers-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-4.14.294-150.533.amzn1.i686
    kernel-tools-4.14.294-150.533.amzn1.i686
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.i686

src:
    kernel-4.14.294-150.533.amzn1.src

x86_64:
    perf-4.14.294-150.533.amzn1.x86_64
    kernel-headers-4.14.294-150.533.amzn1.x86_64
    perf-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-devel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-4.14.294-150.533.amzn1.x86_64
    kernel-devel-4.14.294-150.533.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: before 4.14.294-150.533

External links

http://alas.aws.amazon.com/ALAS-2022-1636.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) Double Free

EUVDB-ID: #VU66397

Risk: Low

CVSSv3.1: 7.5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-2588

CWE-ID: CWE-415 - Double Free

Exploit availability: Yes

Description

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

The vulnerability exists due to a double free error within the network packet scheduler implementation in the route4_change() function in Linux kernel when removing all references to a route filter before freeing it. A local user can run a specially crafted program to crash the kernel or execute arbitrary code.

Mitigation

Update the affected packages:

i686:
    kernel-devel-4.14.294-150.533.amzn1.i686
    kernel-4.14.294-150.533.amzn1.i686
    perf-debuginfo-4.14.294-150.533.amzn1.i686
    perf-4.14.294-150.533.amzn1.i686
    kernel-tools-devel-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-common-i686-4.14.294-150.533.amzn1.i686
    kernel-headers-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-4.14.294-150.533.amzn1.i686
    kernel-tools-4.14.294-150.533.amzn1.i686
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.i686

src:
    kernel-4.14.294-150.533.amzn1.src

x86_64:
    perf-4.14.294-150.533.amzn1.x86_64
    kernel-headers-4.14.294-150.533.amzn1.x86_64
    perf-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-devel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-4.14.294-150.533.amzn1.x86_64
    kernel-devel-4.14.294-150.533.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: before 4.14.294-150.533

External links

http://alas.aws.amazon.com/ALAS-2022-1636.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?

Yes. This vulnerability is being exploited in the wild.

7) Input validation error

EUVDB-ID: #VU67510

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-2663

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass firewall rules.

The vulnerability exists due to insufficient validation of user-supplied input in nf_conntrack_irc in Linux kernel. A remote attacker can send unencrypted IRC with nf_conntrack_irc configured and bypass configured firewall rules.

Mitigation

Update the affected packages:

i686:
    kernel-devel-4.14.294-150.533.amzn1.i686
    kernel-4.14.294-150.533.amzn1.i686
    perf-debuginfo-4.14.294-150.533.amzn1.i686
    perf-4.14.294-150.533.amzn1.i686
    kernel-tools-devel-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-common-i686-4.14.294-150.533.amzn1.i686
    kernel-headers-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-4.14.294-150.533.amzn1.i686
    kernel-tools-4.14.294-150.533.amzn1.i686
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.i686

src:
    kernel-4.14.294-150.533.amzn1.src

x86_64:
    perf-4.14.294-150.533.amzn1.x86_64
    kernel-headers-4.14.294-150.533.amzn1.x86_64
    perf-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-devel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-4.14.294-150.533.amzn1.x86_64
    kernel-devel-4.14.294-150.533.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: before 4.14.294-150.533

External links

http://alas.aws.amazon.com/ALAS-2022-1636.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.

8) Race condition

EUVDB-ID: #VU67477

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-2022-3028

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

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

The vulnerability exists due to a race condition in the Linux kernel's IP framework for transforming packets (XFRM subsystem) when multiple calls to xfrm_probe_algs occurred simultaneously. A local user can exploit the race and escalate privileges on the system.

Mitigation

Update the affected packages:

i686:
    kernel-devel-4.14.294-150.533.amzn1.i686
    kernel-4.14.294-150.533.amzn1.i686
    perf-debuginfo-4.14.294-150.533.amzn1.i686
    perf-4.14.294-150.533.amzn1.i686
    kernel-tools-devel-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-common-i686-4.14.294-150.533.amzn1.i686
    kernel-headers-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-4.14.294-150.533.amzn1.i686
    kernel-tools-4.14.294-150.533.amzn1.i686
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.i686

src:
    kernel-4.14.294-150.533.amzn1.src

x86_64:
    perf-4.14.294-150.533.amzn1.x86_64
    kernel-headers-4.14.294-150.533.amzn1.x86_64
    perf-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-devel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-4.14.294-150.533.amzn1.x86_64
    kernel-devel-4.14.294-150.533.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: before 4.14.294-150.533

External links

http://alas.aws.amazon.com/ALAS-2022-1636.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.

9) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU66808

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-2022-36123

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to Linux kernel lacks a certain clear operation for the block starting symbol (.bss). A local user on the Xen PV guest OS can perform a denial of service attack or escalate privileges on the guest OS.

Mitigation

Update the affected packages:

i686:
    kernel-devel-4.14.294-150.533.amzn1.i686
    kernel-4.14.294-150.533.amzn1.i686
    perf-debuginfo-4.14.294-150.533.amzn1.i686
    perf-4.14.294-150.533.amzn1.i686
    kernel-tools-devel-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-common-i686-4.14.294-150.533.amzn1.i686
    kernel-headers-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-4.14.294-150.533.amzn1.i686
    kernel-tools-4.14.294-150.533.amzn1.i686
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.i686

src:
    kernel-4.14.294-150.533.amzn1.src

x86_64:
    perf-4.14.294-150.533.amzn1.x86_64
    kernel-headers-4.14.294-150.533.amzn1.x86_64
    perf-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-devel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-4.14.294-150.533.amzn1.x86_64
    kernel-devel-4.14.294-150.533.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: before 4.14.294-150.533

External links

http://alas.aws.amazon.com/ALAS-2022-1636.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.

10) Resource management error

EUVDB-ID: #VU66550

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-2022-36879

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to improper management of internal resources within the xfrm_expand_policies() function in net/xfrm/xfrm_policy.c. A local user can cause the refcount to be dropped twice and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

i686:
    kernel-devel-4.14.294-150.533.amzn1.i686
    kernel-4.14.294-150.533.amzn1.i686
    perf-debuginfo-4.14.294-150.533.amzn1.i686
    perf-4.14.294-150.533.amzn1.i686
    kernel-tools-devel-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-common-i686-4.14.294-150.533.amzn1.i686
    kernel-headers-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-4.14.294-150.533.amzn1.i686
    kernel-tools-4.14.294-150.533.amzn1.i686
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.i686

src:
    kernel-4.14.294-150.533.amzn1.src

x86_64:
    perf-4.14.294-150.533.amzn1.x86_64
    kernel-headers-4.14.294-150.533.amzn1.x86_64
    perf-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-devel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-4.14.294-150.533.amzn1.x86_64
    kernel-devel-4.14.294-150.533.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: before 4.14.294-150.533

External links

http://alas.aws.amazon.com/ALAS-2022-1636.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.

11) Input validation error

EUVDB-ID: #VU66476

Risk: Medium

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2022-36946

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input within the nfqnl_mangle() function in net/netfilter/nfnetlink_queue.c in the Linux kernel when processing IPv6 packets. A remote attacker can send specially crafted packets to the system and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

i686:
    kernel-devel-4.14.294-150.533.amzn1.i686
    kernel-4.14.294-150.533.amzn1.i686
    perf-debuginfo-4.14.294-150.533.amzn1.i686
    perf-4.14.294-150.533.amzn1.i686
    kernel-tools-devel-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-common-i686-4.14.294-150.533.amzn1.i686
    kernel-headers-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-4.14.294-150.533.amzn1.i686
    kernel-tools-4.14.294-150.533.amzn1.i686
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.i686

src:
    kernel-4.14.294-150.533.amzn1.src

x86_64:
    perf-4.14.294-150.533.amzn1.x86_64
    kernel-headers-4.14.294-150.533.amzn1.x86_64
    perf-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-devel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-4.14.294-150.533.amzn1.x86_64
    kernel-devel-4.14.294-150.533.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: before 4.14.294-150.533

External links

http://alas.aws.amazon.com/ALAS-2022-1636.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. However, proof of concept for this vulnerability is available.

12) Use-after-free

EUVDB-ID: #VU67915

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-2022-40307

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within the drivers/firmware/efi/capsule-loader.c in Linux kernel. A local user can trigger a use-after-free error and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

i686:
    kernel-devel-4.14.294-150.533.amzn1.i686
    kernel-4.14.294-150.533.amzn1.i686
    perf-debuginfo-4.14.294-150.533.amzn1.i686
    perf-4.14.294-150.533.amzn1.i686
    kernel-tools-devel-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-common-i686-4.14.294-150.533.amzn1.i686
    kernel-headers-4.14.294-150.533.amzn1.i686
    kernel-debuginfo-4.14.294-150.533.amzn1.i686
    kernel-tools-4.14.294-150.533.amzn1.i686
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.i686

src:
    kernel-4.14.294-150.533.amzn1.src

x86_64:
    perf-4.14.294-150.533.amzn1.x86_64
    kernel-headers-4.14.294-150.533.amzn1.x86_64
    perf-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.294-150.533.amzn1.x86_64
    kernel-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-tools-debuginfo-4.14.294-150.533.amzn1.x86_64
    kernel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-devel-4.14.294-150.533.amzn1.x86_64
    kernel-tools-4.14.294-150.533.amzn1.x86_64
    kernel-devel-4.14.294-150.533.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

kernel: before 4.14.294-150.533

External links

http://alas.aws.amazon.com/ALAS-2022-1636.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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