This security bulletin contains one low risk vulnerability.
1) Use-after-free
EUVDB-ID: #VU60797
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-2021-4028
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 RDMA listen() function in Linux kernel. A local user can run a specially crafted program to trigger a use-after-free error and execute arbitrary code with elevated privileges.
MitigationInstall updates from vendor's website.
Vulnerable software versions
kernel (Red Hat package): 3.10.0-693.1.1.el7 - 3.10.0-693.el7
Red Hat Enterprise Linux Server - AUS: 7.4
CPE2.3
External links
http://access.redhat.com/errata/RHSA-2022:2188
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.
Support the originator by clicking the read the rest link below.
