Use-after-free in IBM Cloud Object Storage Systems

1) Use-after-free

EUVDB-ID: #VU64438

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-1184

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service attack.

The vulnerability exists due to a use-after-free error in fs/ext4/namei.c:dx_insert_block() function in the Linux kernel’s filesystem sub-component.. A local user can trigger use-after-free and perform a denial of service attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Cloud Object Storage Systems: before 3.16.7.63

CPE2.3

• cpe:2.3:a:ibm_corporation:ibm_cloud_object_storage_systems:*:*:*:*:*:*:*:*

External links

https://www.ibm.com/blogs/psirt/security-bulletin-vulnerabilities-with-kernel-affect-ibm-cloud-object-storage-systems-august-2022v2/

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.