Red Hat Enterprise Linux 7.6 update for kpatch-patch



Published: 2022-03-29
Risk Low
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2021-4083
CVE-2021-0920
CVE-2022-22942
CVE-2022-0330
CWE-ID CWE-416
CWE-264
CWE-119
Exploitation vector Local
Public exploit Vulnerability #2 is being exploited in the wild.
Vulnerable software
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kpatch-patch-3_10_0-957_86_1 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-957_84_1 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-957_80_1 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-957_78_2 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-957_76_1 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-957_72_1 (Red Hat package)
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-957_88_1 (Red Hat package)
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux Server - AUS
Operating systems & Components / Operating system

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU61246

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-4083

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 Linux kernel's garbage collection for Unix domain socket file handlers. A local user can call close() and fget() simultaneously and can potentially trigger a race condition, which in turn leads to a use-after-free error and allows privilege escalation.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kpatch-patch-3_10_0-957_86_1 (Red Hat package): 1-1.el7

kpatch-patch-3_10_0-957_84_1 (Red Hat package): 1-1.el7 - 1-2.el7

kpatch-patch-3_10_0-957_80_1 (Red Hat package): 1-1.el7 - 1-3.el7

kpatch-patch-3_10_0-957_78_2 (Red Hat package): 1-1.el7 - 1-4.el7

kpatch-patch-3_10_0-957_76_1 (Red Hat package): 1-1.el7 - 1-5.el7

kpatch-patch-3_10_0-957_72_1 (Red Hat package): 1-1.el7 - 1-5.el7

Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions: 7.6

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 7.6

Red Hat Enterprise Linux Server - AUS: 7.6

kpatch-patch-3_10_0-957_88_1 (Red Hat package): before 1-1.el7


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:1103

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Use-after-free

EUVDB-ID: #VU59811

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-0920

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 unix_scm_to_skb() function of af_unix.c in Linux kernel. A local user can run a specially crafted program to trigger a race condition and execute arbitrary code with elevated privileges.


Mitigation

Install updates from vendor's website.

Vulnerable software versions

kpatch-patch-3_10_0-957_86_1 (Red Hat package): 1-1.el7

kpatch-patch-3_10_0-957_84_1 (Red Hat package): 1-1.el7 - 1-2.el7

kpatch-patch-3_10_0-957_80_1 (Red Hat package): 1-1.el7 - 1-3.el7

kpatch-patch-3_10_0-957_78_2 (Red Hat package): 1-1.el7 - 1-4.el7

kpatch-patch-3_10_0-957_76_1 (Red Hat package): 1-1.el7 - 1-5.el7

kpatch-patch-3_10_0-957_72_1 (Red Hat package): 1-1.el7 - 1-5.el7

Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions: 7.6

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 7.6

Red Hat Enterprise Linux Server - AUS: 7.6

kpatch-patch-3_10_0-957_88_1 (Red Hat package): before 1-1.el7


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:1103

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU61217

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2022-22942

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 an error in the vmwgfx driver in Linux kernel. A local unprivileged user can gain access to files opened by other processes on the system through a dangling 'file' pointer.

Exploiting this vulnerability requires an attacker to have access to either /dev/dri/card0 or /dev/dri/rendererD128 and be able to issue an ioctl() on the resulting file descriptor.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kpatch-patch-3_10_0-957_86_1 (Red Hat package): 1-1.el7

kpatch-patch-3_10_0-957_84_1 (Red Hat package): 1-1.el7 - 1-2.el7

kpatch-patch-3_10_0-957_80_1 (Red Hat package): 1-1.el7 - 1-3.el7

kpatch-patch-3_10_0-957_78_2 (Red Hat package): 1-1.el7 - 1-4.el7

kpatch-patch-3_10_0-957_76_1 (Red Hat package): 1-1.el7 - 1-5.el7

kpatch-patch-3_10_0-957_72_1 (Red Hat package): 1-1.el7 - 1-5.el7

Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions: 7.6

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 7.6

Red Hat Enterprise Linux Server - AUS: 7.6

kpatch-patch-3_10_0-957_88_1 (Red Hat package): before 1-1.el7


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:1103

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

4) Buffer overflow

EUVDB-ID: #VU60988

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2022-0330

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

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

The vulnerability exists due to a random memory access flaw caused by a missing TLB flush in Linux kernel GPU i915 kernel driver functionality. A local user can execute arbitrary code on the system with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kpatch-patch-3_10_0-957_86_1 (Red Hat package): 1-1.el7

kpatch-patch-3_10_0-957_84_1 (Red Hat package): 1-1.el7 - 1-2.el7

kpatch-patch-3_10_0-957_80_1 (Red Hat package): 1-1.el7 - 1-3.el7

kpatch-patch-3_10_0-957_78_2 (Red Hat package): 1-1.el7 - 1-4.el7

kpatch-patch-3_10_0-957_76_1 (Red Hat package): 1-1.el7 - 1-5.el7

kpatch-patch-3_10_0-957_72_1 (Red Hat package): 1-1.el7 - 1-5.el7

Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions: 7.6

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 7.6

Red Hat Enterprise Linux Server - AUS: 7.6

kpatch-patch-3_10_0-957_88_1 (Red Hat package): before 1-1.el7


CPE2.3 External links

http://access.redhat.com/errata/RHSA-2022:1103

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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