Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions update for kpatch-patch

1) Use-after-free

EUVDB-ID: #VU56393

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3715

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 in the "Routing decision" classifier in the Linux kernel's Traffic Control networking subsystem (route4_change() function in net/sched/cls_route.c) in the way it handled changing of classification filters. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kpatch-patch-3_10_0-957_94_1 (Red Hat package): 1-1.el7

kpatch-patch-3_10_0-957_92_1 (Red Hat package): 1-1.el7 - 1-2.el7

kpatch-patch-3_10_0-957_84_1 (Red Hat package): 1-1.el7 - 1-5.el7

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_97_1 (Red Hat package): before 1-1.el7

kpatch-patch-3_10_0-957_95_1 (Red Hat package): before 1-1.el7

External links

http://access.redhat.com/errata/RHSA-2022:7173

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) Double Free

EUVDB-ID: #VU66397

Risk: Low

CVSSv3.1: 7.5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-2588

CWE-ID: CWE-415 - Double Free

Exploit availability: Yes

Description

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

The vulnerability exists due to a double free error within the network packet scheduler implementation in the route4_change() function in Linux kernel when removing all references to a route filter before freeing it. A local user can run a specially crafted program to crash the kernel or execute arbitrary code.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kpatch-patch-3_10_0-957_94_1 (Red Hat package): 1-1.el7

kpatch-patch-3_10_0-957_92_1 (Red Hat package): 1-1.el7 - 1-2.el7

kpatch-patch-3_10_0-957_84_1 (Red Hat package): 1-1.el7 - 1-5.el7

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_97_1 (Red Hat package): before 1-1.el7

kpatch-patch-3_10_0-957_95_1 (Red Hat package): before 1-1.el7

External links

http://access.redhat.com/errata/RHSA-2022:7173

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?

Yes. This vulnerability is being exploited in the wild.