CentOS 7 update for kernel



Published: 2023-03-08 | Updated: 2023-07-03
Risk Low
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2018-13405
CVE-2021-4037
CVE-2022-42703
CVE-2022-4378
CWE-ID CWE-264
CWE-284
CWE-416
CWE-121
Exploitation vector Local
Public exploit Public exploit code for vulnerability #3 is available.
Public exploit code for vulnerability #4 is available.
Vulnerable software
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Operating systems & Components / Operating system

Vendor CentOS Project

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Security restrictions bypass

EUVDB-ID: #VU13631

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2018-13405

CWE-ID:

Exploit availability:

Description

The vulnerability allows a local attacker to create arbitrary files on the target system.

The vulnerability exists due to the inode_init_owner function, as defined in the fs/inode.c source code file, allows the creation of arbitrary files in set-group identification (SGID) directories. A local attacker can create arbitrary files with unintended group ownership.

Mitigation

Update the affected packages.

Vulnerable software versions

CentOS: 7

Fixed software versions

CPE2.3 External links

http://lists.centos.org/pipermail/centos-announce/2023-March/086390.html


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Improper access control

EUVDB-ID: #VU63923

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-4037

CWE-ID:

Exploit availability:

Description

The vulnerability allows a local user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the fs/inode.c:inode_init_owner() function logic of the Linux kernel. A local user can create files for the XFS file-system with an unintended group ownership and with group execution and SGID permission bits set to bypass implemented security restrictions and gain unauthorized access to the application.

Mitigation

Update the affected packages.

Vulnerable software versions

CentOS: 7

Fixed software versions

CPE2.3 External links

http://lists.centos.org/pipermail/centos-announce/2023-March/086390.html


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Use-after-free

EUVDB-ID: #VU69297

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2022-42703

CWE-ID:

Exploit availability:

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 mm/rmap.c in the Linux kernel, related to leaf anon_vma double reuse. A local user can trigger a use-after-free error and crash the kernel.

Mitigation

Update the affected packages.

Vulnerable software versions

CentOS: 7

Fixed software versions

CPE2.3 External links

http://lists.centos.org/pipermail/centos-announce/2023-March/086390.html


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

4) Stack-based buffer overflow

EUVDB-ID: #VU70442

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2022-4378

CWE-ID:

Exploit availability:

Description

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

The vulnerability exists due to a boundary error within the __do_proc_dointvec() function. A local user can trigger a stack-based buffer overflow and execute arbitrary code with elevated privileges.

Mitigation

Update the affected packages.

Vulnerable software versions

CentOS: 7

Fixed software versions

CPE2.3 External links

http://lists.centos.org/pipermail/centos-announce/2023-March/086390.html


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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