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amazonAmazonALAS-2022-1838
HistorySep 01, 2022 - 9:09 p.m.

Important: kernel

2022-09-0121:09:00
alas.aws.amazon.com
11
use-after-free flaw
atheros wireless adapter
kvm
spectre variant
retpoline mitigation
intel processors
return predictor
netfilter subsystem

CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

8.2

Confidence

High

EPSS

0.009

Percentile

82.8%

Issue Overview:

2024-07-03: CVE-2019-25162 was added to this advisory.

2024-06-06: CVE-2022-20566 was added to this advisory.

2024-04-11: CVE-2023-1095 was added to this advisory.

In the Linux kernel, the following vulnerability has been resolved:

i2c: Fix a potential use after free

Free the adap structure only after we are done using it.
This patch just moves the put_device() down a bit to avoid the
use after free.

[wsa: added comment to the code, added Fixes tag] (CVE-2019-25162)

A use-after-free flaw was found in the Linux kernel’s Atheros wireless adapter driver in the way a user forces the ath9k_htc_wait_for_target function to fail with some input messages. This flaw allows a local user to crash or potentially escalate their privileges on the system. (CVE-2022-1679)

In l2cap_chan_put of l2cap_core, there is a possible use after free due to improper locking. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-165329981References: Upstream kernel (CVE-2022-20566)

A flaw was found in the Linux kernel’s KVM when attempting to set a SynIC IRQ. This issue makes it possible for a misbehaving VMM to write to SYNIC/STIMER MSRs, causing a NULL pointer dereference. 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-2022-2153)

A use-after-free flaw was found in route4_change in the net/sched/cls_route.c filter implementation in the Linux kernel. This flaw allows a local user to crash the system and possibly lead to a local privilege escalation problem. (CVE-2022-2588)

Non-transparent sharing of return predictor targets between contexts in some Intel® Processors may allow an authorized user to potentially enable information disclosure via local access. (CVE-2022-26373)

A flaw was found in hw. The unprotected alternative channel of return branch target prediction in some Intel® Processors may allow an authorized user to enable information disclosure via local access. (CVE-2022-28693)

Intel microprocessor generations 6 to 8 are affected by a new Spectre variant that is able to bypass their retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can hijack return instructions to achieve arbitrary speculative code execution under certain microarchitecture-dependent conditions. (CVE-2022-29901)

A memory corruption flaw was found in the Linux kernel’s Netfilter subsystem in the way a local user uses the libnetfilter_queue when analyzing a corrupted network packet. This flaw allows a local user to crash the system or a remote user to crash the system when the libnetfilter_queue is used by a local user. (CVE-2022-36946)

In nf_tables_updtable, if nf_tables_table_enable returns an error, nft_trans_destroy is called to free the transaction object. nft_trans_destroy() calls list_del(), but the transaction was never placed on a list – the list head is all zeroes, this results in a NULL pointer dereference. (CVE-2023-1095)

Affected Packages:

kernel

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update kernel to update your system.

New Packages:

aarch64:  
    kernel-4.14.291-218.527.amzn2.aarch64  
    kernel-headers-4.14.291-218.527.amzn2.aarch64  
    kernel-debuginfo-common-aarch64-4.14.291-218.527.amzn2.aarch64  
    perf-4.14.291-218.527.amzn2.aarch64  
    perf-debuginfo-4.14.291-218.527.amzn2.aarch64  
    python-perf-4.14.291-218.527.amzn2.aarch64  
    python-perf-debuginfo-4.14.291-218.527.amzn2.aarch64  
    kernel-tools-4.14.291-218.527.amzn2.aarch64  
    kernel-tools-devel-4.14.291-218.527.amzn2.aarch64  
    kernel-tools-debuginfo-4.14.291-218.527.amzn2.aarch64  
    kernel-devel-4.14.291-218.527.amzn2.aarch64  
    kernel-debuginfo-4.14.291-218.527.amzn2.aarch64  
  
i686:  
    kernel-headers-4.14.291-218.527.amzn2.i686  
  
src:  
    kernel-4.14.291-218.527.amzn2.src  
  
x86_64:  
    kernel-4.14.291-218.527.amzn2.x86_64  
    kernel-headers-4.14.291-218.527.amzn2.x86_64  
    kernel-debuginfo-common-x86_64-4.14.291-218.527.amzn2.x86_64  
    perf-4.14.291-218.527.amzn2.x86_64  
    perf-debuginfo-4.14.291-218.527.amzn2.x86_64  
    python-perf-4.14.291-218.527.amzn2.x86_64  
    python-perf-debuginfo-4.14.291-218.527.amzn2.x86_64  
    kernel-tools-4.14.291-218.527.amzn2.x86_64  
    kernel-tools-devel-4.14.291-218.527.amzn2.x86_64  
    kernel-tools-debuginfo-4.14.291-218.527.amzn2.x86_64  
    kernel-devel-4.14.291-218.527.amzn2.x86_64  
    kernel-debuginfo-4.14.291-218.527.amzn2.x86_64  
    kernel-livepatch-4.14.291-218.527-1.0-0.amzn2.x86_64  

Additional References

Red Hat: CVE-2019-25162, CVE-2022-1679, CVE-2022-20566, CVE-2022-2153, CVE-2022-2588, CVE-2022-26373, CVE-2022-28693, CVE-2022-29901, CVE-2022-36946, CVE-2023-1095

Mitre: CVE-2019-25162, CVE-2022-1679, CVE-2022-20566, CVE-2022-2153, CVE-2022-2588, CVE-2022-26373, CVE-2022-28693, CVE-2022-29901, CVE-2022-36946, CVE-2023-1095

CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

8.2

Confidence

High

EPSS

0.009

Percentile

82.8%