Multiple vulnerabilities in B&R Automation Studio



Published: 2020-04-06
Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2019-19100
CVE-2019-19101
CVE-2019-19102
CWE-ID CWE-264
CWE-325
CWE-22
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Automation Studio
Other software / Other software solutions

Vendor B&R Industrial Automation GmbH

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU26604

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19100

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 improper permission checks in the upgrade service. A local user can delete arbitrary files via an exposed interface.

This vulnerability affects the following versions:

  • Automation Studio, Versions 4.0.x
  • Automation Studio, Versions 4.1.x
  • Automation Studio, Versions 4.2.x
  • Automation Studio, versions prior to 4.3.11SP
  • Automation Studio, versions prior to 4.4.9SP
  • Automation Studio, versions prior to 4.5.4SP
  • Automation Studio, versions prior to 4.6.3SP
  • Automation Studio, versions prior to 4.7.2
  • Automation Studio, versions prior to 4.8.1
  • Mitigation

    Install updates from vendor's website.

    Vulnerable software versions

    Automation Studio: before 4.8.1, 4.7.2, 4.6.3SP, 4.5.4SP, 4.4.9SP, 4.3.11SP


    CPE2.3 External links

    http://ics-cert.us-cert.gov/advisories/icsa-20-093-01
    http://www.br-automation.com/en-gb/service/cyber-security/

    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) Missing Required Cryptographic Step

    EUVDB-ID: #VU26605

    Risk: Medium

    CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

    CVE-ID: CVE-2019-19101

    CWE-ID: CWE-325 - Missing Required Cryptographic Step

    Exploit availability: No

    Description

    The vulnerability allows a remote attacker to perform a man-in-the-middle (MitM) attack.

    The vulnerability exists due to the missing secure communication definition and an incomplete TLS validation in the upgrade service. A remote attacker can perform MitM attacks via the B&R upgrade server. 

    This vulnerability affects the following versions:

  • Automation Studio, Versions 4.0.x
  • Automation Studio, Versions 4.1.x
  • Automation Studio, Versions 4.2.x
  • Automation Studio, versions prior to 4.3.11SP
  • Automation Studio, versions prior to 4.4.9SP
  • Automation Studio, versions prior to 4.5.4SP
  • Automation Studio, versions prior to 4.6.3SP
  • Automation Studio, versions prior to 4.7.2
  • Automation Studio, versions prior to 4.8.1
  • Mitigation

    Install updates from vendor's website.

    Vulnerable software versions

    Automation Studio: before 4.8.1, 4.7.2, 4.6.3SP, 4.5.4SP, 4.4.9SP, 4.3.11SP


    CPE2.3 External links

    http://ics-cert.us-cert.gov/advisories/icsa-20-093-01
    http://www.br-automation.com/en-gb/service/cyber-security/

    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.

    3) Path traversal

    EUVDB-ID: #VU26606

    Risk: Low

    CVSSv3.1: 5.4 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

    CVE-ID: CVE-2019-19102

    CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

    Exploit availability: No

    Description

    The vulnerability allows a local attacker to perform directory traversal attacks.

    The vulnerability exists due to input validation error when processing directory traversal sequences in SharpZipLib used in the upgrade service. A local attacker can send a specially crafted HTTP request and read arbitrary files on the system.

    This vulnerability affects the following versions:

  • Automation Studio, Versions 4.0.x
  • Automation Studio, Versions 4.1.x
  • Automation Studio, Versions 4.2.x
  • Automation Studio, versions prior to 4.3.11SP
  • Automation Studio, versions prior to 4.4.9SP
  • Automation Studio, versions prior to 4.5.4SP
  • Automation Studio, versions prior to 4.6.3SP
  • Automation Studio, versions prior to 4.7.2
  • Automation Studio, versions prior to 4.8.1
  • Mitigation

    Install update from vendor's website.

    Vulnerable software versions

    Automation Studio: before 4.8.1, 4.7.2, 4.6.3SP, 4.5.4SP, 4.4.9SP, 4.3.11SP


    CPE2.3 External links

    http://ics-cert.us-cert.gov/advisories/icsa-20-093-01
    http://www.br-automation.com/en-gb/service/cyber-security/

    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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