Link following in IBM Storage Ceph



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-35938
CWE-ID CWE-59
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Storage Ceph
Other software / Other software solutions

Vendor IBM Corporation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Link following

EUVDB-ID: #VU79521

Risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-35938

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Exploit availability: No

Description

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

The vulnerability occurs when rpm sets the desired permissions and credentials after installing a file. A local privileged user can use this flaw to exchange the original file with a symbolic link to a security-critical file and escalate their privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Storage Ceph: before 7.0

CPE2.3 External links

https://www.ibm.com/support/pages/node/7162486


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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