Red Hat Enterprise Linux 7 update for kpatch-patch



Published: 2021-04-06
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2021-27364
CVE-2021-27365
CWE ID CWE-264
CWE-119
Exploitation vector Local
Public exploit N/A
Vulnerable software
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kpatch-patch-3_10_0-1160_6_1 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-1160_2_2 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-1160_2_1 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-1160_15_2 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-1160_11_1 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-1160 (Red Hat package)
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux for Power, little endian
Operating systems & Components / Operating system

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

Vendor Red Hat Inc.

Security Advisory

1) Permissions, Privileges, and Access Controls

Risk: Low

CVSSv3.1: 7.1 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C] [PCI]

CVE-ID: CVE-2021-27364

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 iscsi_if_recv_msg() allows non-root users to connect and send commands to the Linux kernel. A local user can escalate privileges on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kpatch-patch-3_10_0-1160_6_1 (Red Hat package): 1-3.el7

kpatch-patch-3_10_0-1160_2_2 (Red Hat package): 1-3.el7

kpatch-patch-3_10_0-1160_2_1 (Red Hat package): 1-3.el7

kpatch-patch-3_10_0-1160_15_2 (Red Hat package): 1-2.el7

kpatch-patch-3_10_0-1160_11_1 (Red Hat package): 1-2.el7

kpatch-patch-3_10_0-1160 (Red Hat package): 1-3.el7

Red Hat Enterprise Linux for Power, little endian: 7

Red Hat Enterprise Linux Server: 7

kpatch-patch-3_10_0-1160_21_1 (Red Hat package): before 1-2.el7

CPE External links

https://access.redhat.com/errata/RHSA-2021:1069

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) Buffer overflow

Risk: Low

CVSSv3.1: 7.1 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C] [PCI]

CVE-ID: CVE-2021-27365

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 boundary error when processing Netlink messages in Linux kernel through 5.11.3, as certain iSCSI data structures do not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. A local unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message, trigger memory corruption and execute arbitrary code on the system with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kpatch-patch-3_10_0-1160_6_1 (Red Hat package): 1-3.el7

kpatch-patch-3_10_0-1160_2_2 (Red Hat package): 1-3.el7

kpatch-patch-3_10_0-1160_2_1 (Red Hat package): 1-3.el7

kpatch-patch-3_10_0-1160_15_2 (Red Hat package): 1-2.el7

kpatch-patch-3_10_0-1160_11_1 (Red Hat package): 1-2.el7

kpatch-patch-3_10_0-1160 (Red Hat package): 1-3.el7

Red Hat Enterprise Linux for Power, little endian: 7

Red Hat Enterprise Linux Server: 7

kpatch-patch-3_10_0-1160_21_1 (Red Hat package): before 1-2.el7

CPE External links

https://access.redhat.com/errata/RHSA-2021:1069

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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