02 July 2021

KLCERT-21-016: Robert Bosch GmbH CPP HD/MP cameras. Multiple reflected XSS in URI handlers

Researcher

Alexander Nochvay

Timeline

Timeline

  • Kaspersky ICS CERT advisory published

    02 July 2021

  • Vendor advisory published

    09 June 2021

  • Vulnerability reported

    20 April 2021

Description

Kaspersky ICS CERT discovered multiple reflected XSS in URI handlers.

Scope
Scope changed

Exploitability

⚠ Remotely exploitable: victim should have a network access to ports 80/TCP or 443/TCP

Attack complexity

⚠ Low skill level to exploit

Privilege required

⚠ No privileges required

User interaction

User interaction required: a user must follow the attacker’s malicious link

Impact

⚠ It is possible to execute any RCP+ command via RCP+ over CGI.

Affected products

  • CPP4 HD/MP cameras:
    • 7.10 – All firmware build versions before 7.10.0095
  • CPP6 HD/MP cameras:
    • 7.60 – All firmware build versions
    • 7.61 – All firmware build versions
    • 7.62 – All firewall build versions before 7.62.0005
    • 7.70 – All firmware build versions
    • 7.80 – All firmware build versions before 7.80.0129
  • AVIOTEC cameras:
    • 7.61 – All firmware build versions
    • 7.70 – All firmware build versions
    • 7.72 – All firmware build versions before 7.72.0013
  • CPP7 HD/MP cameras:
    • 7.60 – All firmware build versions
    • 7.61 – All firmware build versions
    • 7.62 – All firmware build versions before 7.62.0005
    • 7.70 – All firmware build versions
    • 7.72 – All firmware build versions
    • 7.80 – All firmware build versions before 7.80.0129
  • CPP7.3 HD/MP cameras:
    • 7.60 – All firmware build versions
    • 7.61 – All firmware build versions
    • 7.62 – All firmware build versions before 7.62.0005
    • 7.70 – All firmware build versions
    • 7.72 – All firmware build versions
    • 7.80 – All firmware build versions before 7.80.0129
  • CPP13 HD/MP cameras:
    • 7.75 – All firmware build versions before 7.75.0008

Mitigation

Robert Bosch GmbH mitigation

Software Updates: The recommended approach is to update the affected Bosch firmware to a fixed version. If an update is not possible in timely manner, users are recommended to follow the mitigations and workarounds described in the following section.

Secure Configuration Environment: It is advised to use a Bosch tool like the Configuration Manager to configure the camera, that does not allow for issues like CSRF and XSS.

When using the web based configuration interface and currently being logged in as administrator, some security precautions can be taken to mitigate XSS and CSRF vulnerabilities:

  • No other websites or email content should be opened as long as the session to the camera is active
  • No links should be clicked from an untrusted external source that link back to the camera.
  • Use a different browser than the system default browser to open a session to the camera as there is no XSS or CSRF between browsers.
  • Always log out and/or close the browser (not only the tab) to clear any session data

Kaspersky publishes information on newly identified vulnerabilities in order to raise user awareness of the IT security threats detected. Kaspersky does not make any guarantees in respect of information received from vendors of products in which vulnerabilities have been identified, which is included in the following sections of the advisory: Affected Products, Vendor Mitigation.

Timeline

  • Kaspersky ICS CERT advisory published

    02 July 2021

  • Vendor advisory published

    09 June 2021

  • Vulnerability reported

    20 April 2021