Privilege escalation in nfs-utils package in openSUSE



Published: 2019-10-29
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-3689
CWE-ID CWE-264
Exploitation vector Local
Public exploit N/A
Vulnerable software
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SUSE Linux
Operating systems & Components / Operating system

Vendor SUSE

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU22333

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-2019-3689

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to insecure permissions on the " /var/lib/nfs" directory owned by statd:nogroup in the nfs-utils package in SUSE Linux Enterprise Server 12 before and including version 1.3.0-34.18.1 and in SUSE Linux Enterprise Server 15 before and including version 2.1.1-6.10.2. This directory contains files owned and managed by root. If statd is compromised, it can therefore trick processes running with root privileges into creating/overwriting files anywhere on the system.

Successful exploitation of the vulnerability may allow a local user to escalate privileges on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

SUSE Linux: 15

External links

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00071.html


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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