Vulnerability CVE-2020-3948

Vulnerability Name:

CVE-2020-3948 (CCN-177738)

Assigned:

2019-12-30

Published:

2020-03-12

Updated:

2021-07-21

Summary:

Linux Guest VMs running on VMware Workstation (15.x before 15.5.2) and Fusion (11.x before 11.5.2) contain a local privilege escalation vulnerability due to improper file permissions in Cortado Thinprint. Local attackers with non-administrative access to a Linux guest VM with virtual printing enabled may exploit this issue to elevate their privileges to root on the same guest VM.

CVSS v3 Severity:

7.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.8 Medium (Temporal CVSS v3.1 Vector: 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)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

7.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.8 Medium (CCN Temporal CVSS v3.1 Vector: 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)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

CVSS v2 Severity:

4.6 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

6.8 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:C/A:C)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

Vulnerability Type:

CWE-269

Vulnerability Consequences:

Gain Privileges

References:

Source: MITRE
Type: CNA
CVE-2020-3948

Source: XF
Type: UNKNOWN
vmware-cve20203948-priv-esc(177738)

Source: CCN
Type: VMware Security Advisory VMSA-2020-0004
VMware Horizon Client, VMRC, VMware Workstation and Fusion updates address use-after-free and privilege escalation vulnerabilities (CVE-2019-5543, CVE-2020-3947, CVE-2020-3948)

Source: CONFIRM
Type: Vendor Advisory
https://www.vmware.com/security/advisories/VMSA-2020-0004.html

Source: CCN
Type: ZDI-20-299
VMware Workstation Virtual Printer External Control of File Name Privilege Escalation Vulnerability

Source: CCN
Type: ZDI-20-299
VMware Workstation Virtual Printer External Control of File Name Privilege Escalation Vulnerability

Vulnerable Configuration:

Configuration 1:

cpe:/a:vmware:fusion:*:*:*:*:*:*:*:* (Version >= 11.0.0 and < 11.5.2)

OR cpe:/a:vmware:workstation:*:*:*:*:*:*:*:* (Version >= 15.0.0 and < 15.5.2)

Configuration CCN 1:

cpe:/a:vmware:workstation:15.0:*:*:*:*:*:*:*

OR cpe:/a:vmware:fusion:11.0:*:*:*:*:*:*:*

Denotes that component is vulnerable

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