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amazonAmazonALAS2-2022-1813
HistoryJul 06, 2022 - 3:13 a.m.

Important: kernel

2022-07-0603:13:00
alas.aws.amazon.com
21

8.3 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

48.2%

Issue Overview:

A kernel information leak flaw was identified in the scsi_ioctl function in drivers/scsi/scsi_ioctl.c in the Linux kernel. This flaw allows a local attacker with a special user privilege (CAP_SYS_ADMIN or CAP_SYS_RAWIO) to create issues with confidentiality. (CVE-2022-0494)

An information leak flaw was found in NFS over RDMA in the net/sunrpc/xprtrdma/rpc_rdma.c function in RPCRDMA_HDRLEN_MIN (7) (in rpcrdma_max_call_header_size, rpcrdma_max_reply_header_size). This flaw allows an attacker with normal user privileges to leak kernel information. (CVE-2022-0812)

Due to the small table perturb size, a memory leak flaw was found in the Linux kernel’s TCP source port generation algorithm in the net/ipv4/tcp.c function. This flaw allows an attacker to leak information and may cause a denial of service. (CVE-2022-1012)

A use-after-free flaw was found in fs/ext4/namei.c:dx_insert_block() in the Linux kernel’s filesystem sub-component. This flaw allows a local attacker with a user privilege to cause a denial of service. (CVE-2022-1184)

A use-after-free vulnerability was found in the Linux kernel’s Netfilter subsystem in net/netfilter/nf_tables_api.c. This flaw allows a local attacker with user access to cause a privilege escalation issue. (CVE-2022-1966)

net/netfilter/nf_tables_api.c in the Linux kernel through 5.18.1 allows a local user (able to create user/net namespaces) to escalate privileges to root because an incorrect NFT_STATEFUL_EXPR check leads to a use-after-free. (CVE-2022-32250)

The Linux kernel before 5.17.9 allows TCP servers to identify clients by observing what source ports are used. (CVE-2022-32296)

An issue was discovered in the Linux kernel through 5.18.3 on powerpc 32-bit platforms. There is a buffer overflow in ptrace PEEKUSER and POKEUSER (aka PEEKUSR and POKEUSR) when accessing floating point registers. (CVE-2022-32981)

A flaw was found in hw. Incomplete cleanup of multi-core shared buffers for some Intel® Processors may allow an authenticated user to enable information disclosure via local access. (CVE-2022-21123)

A flaw was found in hw. Incomplete cleanup of microarchitectural fill buffers on some Intel® Processors may allow an authenticated user to enable information disclosure via local access. (CVE-2022-21125)

A flaw was found in hw. Incomplete cleanup in specific special register write operations for some Intel® Processors may allow an authenticated user to enable information disclosure via local access. (CVE-2022-21166)
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References to CVE-2022-21123, CVE-2022-21125, and CVE-2022-21166 have been added after the original release of this advisory, however those vulnerabilities were fixed by the packages referenced by this advisory’s initial release on 2022-07-06.

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-4.14.285-215.501.amzn2.aarch64  
    kernel-headers-4.14.285-215.501.amzn2.aarch64  
    kernel-debuginfo-common-aarch64-4.14.285-215.501.amzn2.aarch64  
    perf-4.14.285-215.501.amzn2.aarch64  
    perf-debuginfo-4.14.285-215.501.amzn2.aarch64  
    python-perf-4.14.285-215.501.amzn2.aarch64  
    python-perf-debuginfo-4.14.285-215.501.amzn2.aarch64  
    kernel-tools-4.14.285-215.501.amzn2.aarch64  
    kernel-tools-devel-4.14.285-215.501.amzn2.aarch64  
    kernel-tools-debuginfo-4.14.285-215.501.amzn2.aarch64  
    kernel-devel-4.14.285-215.501.amzn2.aarch64  
    kernel-debuginfo-4.14.285-215.501.amzn2.aarch64  
  
i686:  
    kernel-headers-4.14.285-215.501.amzn2.i686  
  
src:  
    kernel-4.14.285-215.501.amzn2.src  
  
x86_64:  
    kernel-4.14.285-215.501.amzn2.x86_64  
    kernel-headers-4.14.285-215.501.amzn2.x86_64  
    kernel-debuginfo-common-x86_64-4.14.285-215.501.amzn2.x86_64  
    perf-4.14.285-215.501.amzn2.x86_64  
    perf-debuginfo-4.14.285-215.501.amzn2.x86_64  
    python-perf-4.14.285-215.501.amzn2.x86_64  
    python-perf-debuginfo-4.14.285-215.501.amzn2.x86_64  
    kernel-tools-4.14.285-215.501.amzn2.x86_64  
    kernel-tools-devel-4.14.285-215.501.amzn2.x86_64  
    kernel-tools-debuginfo-4.14.285-215.501.amzn2.x86_64  
    kernel-devel-4.14.285-215.501.amzn2.x86_64  
    kernel-debuginfo-4.14.285-215.501.amzn2.x86_64  
    kernel-livepatch-4.14.285-215.501-1.0-0.amzn2.x86_64  

Additional References

Red Hat: CVE-2022-0494, CVE-2022-0812, CVE-2022-1012, CVE-2022-1184, CVE-2022-1966, CVE-2022-21123, CVE-2022-21125, CVE-2022-21166, CVE-2022-32250, CVE-2022-32296, CVE-2022-32981

Mitre: CVE-2022-0494, CVE-2022-0812, CVE-2022-1012, CVE-2022-1184, CVE-2022-1966, CVE-2022-21123, CVE-2022-21125, CVE-2022-21166, CVE-2022-32250, CVE-2022-32296, CVE-2022-32981