Ubuntu update for cifs-utils



Risk Medium
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2020-14342
CVE-2021-20208
CVE-2022-27239
CVE-2022-29869
CWE-ID CWE-78
CWE-269
CWE-121
CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

cifs-utils (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) OS Command Injection

EUVDB-ID: #VU46731

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-14342

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

It was found that cifs-utils' mount.cifs was invoking a shell when requesting the Samba password, which could be used to inject arbitrary commands. An attacker able to invoke mount.cifs with special permission, such as via sudo rules, could use this flaw to escalate their privileges.

Mitigation

Update the affected package cifs-utils to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 22.04

cifs-utils (Ubuntu package): before 2:6.8-1ubuntu1.2

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5459-1


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) 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

Update the affected package cifs-utils to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 22.04

cifs-utils (Ubuntu package): before 2:6.8-1ubuntu1.2

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5459-1


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.

3) Stack-based buffer overflow

EUVDB-ID: #VU63956

Risk: Low

CVSSv4.0: 7.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear]

CVE-ID: CVE-2022-27239

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error when parsing the "mount.cifs ip=" command-line argument. A local user can pass specially crafted data to the command, trigger a stack-based buffer overflow and execute arbitrary code with root privileges.

Mitigation

Update the affected package cifs-utils to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 22.04

cifs-utils (Ubuntu package): before 2:6.8-1ubuntu1.2

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5459-1


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.

4) Information disclosure

EUVDB-ID: #VU62702

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-29869

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in the stderr function when verbose logging is configured. A remote attacker can gain unauthorized access to sensitive information on the system.

Mitigation

Update the affected package cifs-utils to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 22.04

cifs-utils (Ubuntu package): before 2:6.8-1ubuntu1.2

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5459-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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