VMware Workstation/Player on Debian Linux Mount /usr/bin/vmware-mount access control

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in VMware Workstation and Player on Debian Linux. Affected by this vulnerability is an unknown functionality of the file /usr/bin/vmware-mount of the component Mount Handler. Performing a manipulation results in access control. This vulnerability is known as CVE-2013-1662. Furthermore, an exploit is available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in VMware Workstation and Player on Debian Linux (Virtualization Software) (version now known). This affects some unknown processing of the file /usr/bin/vmware-mount of the component Mount Handler. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, and integrity. The summary by CVE is:

vmware-mount in VMware Workstation 8.x and 9.x and VMware Player 4.x and 5.x, on systems based on Debian GNU/Linux, allows host OS users to gain host OS privileges via a crafted lsb_release binary in a directory in the PATH, related to use of the popen library function.

The weakness was published 08/22/2013 by Tavis Ormandy (@taviso) with Google Security Team as VMSA-2013-0010 as confirmed advisory (Website). The advisory is shared at vmware.com. The public release has been coordinated with VMware. The advisory contains:

It looks like Debian originally decided they didn't want privmode because it broke UUCP.
This vulnerability is uniquely identified as CVE-2013-1662 since 02/12/2013. An attack has to be approached locally. Required for exploitation is a authentication. Technical details and a public exploit are known. MITRE ATT&CK project uses the attack technique T1068 for this issue. The advisory points out:
On most modern Linux systems, /bin/sh is provided by bash, which detects that it's being invoked as sh, and attempts to mimic traditional sh. As everyone who works in security quickly learns, bash will drop privileges very early if uid != euid. (…) However, this never really happens on Debian derived systems.

A public exploit has been developed by Tavis Ormandy (@taviso) in Bash and been published immediately after the advisory. The exploit is shared for download at blog.cmpxchg8b.com. It is declared as highly functional. We expect the 0-day to have been worth approximately $25k-$100k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 121406 (Multiple VMware Products Local Privilege Escalation Vulnerability). The advisory illustrates:

(…) [Y]ou can get a nice easy root shell like this on any Debian/Ubuntu derived system with VMware installed: $ cc -xc - -olsb_release<<<'main(){system("sh>`tty` 2>&1");}';PATH=.:$PATH vmware-mount

Applying a patch is able to eliminate this problem. The bugfix is ready for download at patch-tracker.debian.org. It is possible to mitigate the problem by applying the configuration setting chmod u-s /usr/bin/vmware-mount. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (86592), Exploit-DB (27938), SecurityFocus (BID 61966†), OSVDB (96588†) and Secunia (SA54580†). Further details are available at blog.cmpxchg8b.com. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.4
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Highly functional
Author: Tavis Ormandy (@taviso)
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: vmware_mount.rb
MetaSploit Name: VMWare Setuid vmware-mount Unsafe popen(3)
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Patch: patch-tracker.debian.org
Config: chmod u-s /usr/bin/vmware-mount

Timelineinfo

02/12/2013 🔍
08/22/2013 +191 days 🔍
08/22/2013 +0 days 🔍
08/22/2013 +0 days 🔍
08/22/2013 +0 days 🔍
08/22/2013 +0 days 🔍
08/23/2013 +1 days 🔍
08/23/2013 +0 days 🔍
08/29/2013 +6 days 🔍
08/29/2013 +0 days 🔍
09/12/2013 +14 days 🔍
12/27/2024 +4124 days 🔍

Sourcesinfo

Vendor: vmware.com

Advisory: VMSA-2013-0010
Researcher: Tavis Ormandy (@taviso)
Organization: Google Security Team
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2013-1662 (🔍)
GCVE (CVE): GCVE-0-2013-1662
GCVE (VulDB): GCVE-100-10065
X-Force: 86592
SecurityFocus: 61966 - Multiple VMware Products CVE-2013-1662 Local Privilege Escalation Vulnerability
Secunia: 54580 - VMware Workstation / Player "vmware-mount" Privilege Escalation Vulnerability, Less Critical
OSVDB: 96588
Vulnerability Center: 41492 - VMware Workstation 8.x, 9.x and VMware Player 4.x, 5.x on Debian Linux Local Bypass Restrictions Vulnerability, Medium

scip Labs: https://www.scip.ch/en/?labs.20060413
Misc.: 🔍

Entryinfo

Created: 08/29/2013 10:21
Updated: 12/27/2024 17:47
Changes: 08/29/2013 10:21 (95), 05/11/2017 08:44 (2), 12/01/2024 04:49 (16), 12/27/2024 17:47 (2)
Complete: 🔍
Cache ID: 216:68A:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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