openEuler 20.03 LTS SP1 update for cifs-utils

1) Improper Privilege Management

EUVDB-ID: #VU63954

Risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-20208

CWE-ID: CWE-269 - Improper Privilege Management

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to improper privilege management in cifs-utils. A local user when mounting a krb5 CIFS file system from within a container can use Kerberos credentials of the host.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1

cifs-utils-help: before 6.10-2

cifs-utils-debugsource: before 6.10-2

cifs-utils-debuginfo: before 6.10-2

cifs-utils-devel: before 6.10-2

cifs-utils: before 6.10-2

CPE2.3

• cpe:2.3:o:openeuler:openeuler:20.03:LTS SP1:*:*:*:*:*:*
• cpe:2.3:a:openeuler:cifs-utils-help:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:cifs-utils-debugsource:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:cifs-utils-debuginfo:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:cifs-utils-devel:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:cifs-utils:*:*:*:*:*:openeuler:*:*

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1193

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.