As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens’ ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
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1. EXECUTIVE SUMMARY
- CVSS v3 7.5
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: RUGGEDCOM APE1808 Devices
- Vulnerabilities: Out-of-bounds Read, Insertion of Sensitive Information Into Sent Data, Allocation of Resources Without Limits or Throttling, Integer Overflow or Wraparound, Path Traversal, Out-of-bounds Write, HTTP Request/Response Splitting
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to cause a denial-of service condition, perform a machine-in-the middle attack (MITM), escalate privileges, execute unauthorized code, and access unauthorized systems and information.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Siemens reports that the following products are affected:
- Siemens RUGGEDCOM APE1808: All versions
3.2 VULNERABILITY OVERVIEW
3.2.1 OUT-OF-BOUNDS READ CWE-125
An out-of-bounds read vulnerability [CWE-125] in FortiOS SSLVPN web portal versions 7.4.0 through 7.4.4, versions 7.2.0 through 7.2.8, 7.0 all versions, and 6.4 all versions may allow an authenticated attacker to perform a denial-of-service on the SSLVPN web portal via a specially crafted URL.
CVE-2024-36504 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
3.2.2 INSERTION OF SENSITIVE INFORMATION INTO SENT DATA CWE-201
An insertion of sensitive information into sent data vulnerability [CWE-201] in FortiOS 7.6.0, 7.4.0 through 7.4.4 may allow an attacker in a man-in-the-middle position to retrieve the RADIUS accounting server shared secret via intercepting accounting-requests.
CVE-2024-46665 has been assigned to this vulnerability. A CVSS v3 base score of 3.7 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N).
3.2.3 ALLOCATION OF RESOURCES WITHOUT LIMITS OR THROTTLING CWE-770
An allocation of resources without limits or throttling [CWE-770] vulnerability in FortiOS versions 7.6.0, versions 7.4.4 through 7.4.0, 7.2 all versions, 7.0 all versions, 6.4 all versions may allow a remote unauthenticated attacker to prevent access to the GUI via specially crafted requests directed at specific endpoints.
CVE-2024-46666 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).
3.2.4 ALLOCATION OF RESOURCES WITHOUT LIMITS OR THROTTLING CWE-770
An allocation of resources without limits or throttling vulnerability [CWE-770] in FortiOS versions 7.4.0 through 7.4.4, versions 7.2.0 through 7.2.8, versions 7.0.0 through 7.0.15, and versions 6.4.0 through 6.4.15 may allow an unauthenticated remote user to consume all system memory via multiple large file uploads.
CVE-2024-46668 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
3.2.5 INTEGER OVERFLOW OR WRAPAROUND CWE-190
An Integer Overflow or Wraparound vulnerability in version 7.4.4 and below, version 7.2.10 and below; FortiSASE version 23.4.b FortiOS tenant IPsec IKE service may allow an authenticated attacker to crash the IPsec tunnel via crafted requests, resulting in potential denial-of-service.
CVE-2024-46669 has been assigned to this vulnerability. A CVSS v3 base score of 3.5 has been calculated; the CVSS vector string is (CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L).
3.2.6 OUT-OF-BOUNDS READ CWE-125
An Out-of-bounds Read vulnerability in FortiOS version 7.6.0, version 7.4.4 and below, version 7.2.9 and below and FortiSASE FortiOS tenant version 24.3.b IPsec IKE service may allow an unauthenticated remote attacker to trigger memory consumption leading to denial-of-service via crafted requests.
CVE-2024-46670 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
3.2.7 IMPROPER LIMITATION OF A PATHNAME TO A RESTRICTED DIRECTORY (‘PATH TRAVERSAL’) CWE-22
A improper limitation of a pathname to a restricted directory (‘path traversal’) in Fortinet FortiManager versions 7.6.0 through 7.6.1, 7.4.1 through 7.4.3, FortiOS versions 7.6.0, 7.4.0 through 7.4.4, 7.2.5 through 7.2.9, 7.0.0 through 7.0.15, 6.4.0 through 6.4.15, FortiProxy 7.4.0 through 7.4.5, 7.2.0 through 7.2.11, 7.0.0 through 7.0.18, 2.0.0 through 2.0.14, 1.2.0 through 1.2.13, 1.1.0 through 1.1.6, 1.0.0 through 1.0.7, FortiManager Cloud versions 7.4.1 through 7.4.3 allows attacker to trigger an escalation of privilege via specially crafted packets.
CVE-2024-48884 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
3.2.8 IMPROPER LIMITATION OF A PATHNAME TO A RESTRICTED DIRECTORY (‘PATH TRAVERSAL’) CWE-22
A improper limitation of a pathname to a restricted directory (‘path traversal’) in Fortinet FortiRecorder versions 7.2.0 through 7.2.1, 7.0.0 through 7.0.4, FortiWeb versions 7.6.0, 7.4.0 through 7.4.4, 7.2.0 through 7.2.10, 7.0.0 through 7.0.10, 6.4.0 through 6.4.3, FortiVoice versions 7.0.0 through 7.0.4, 6.4.0 through 6.4.9, 6.0.0 through 6.0.12 allows attacker to escalate privilege via specially crafted packets.
CVE-2024-48885 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H).
3.2.9 OUT-OF-BOUNDS WRITE CWE-787
A out-of-bounds write in Fortinet FortiOS versions 7.6.0, 7.4.0 through 7.4.6, 7.2.0 through 7.2.10, 7.0.0 through 7.0.16, 6.4.0 through 6.4.15 allows attacker to trigger a denial-of-service via specially crafted packets.
CVE-2024-52963 has been assigned to this vulnerability. A CVSS v3 base score of 3.7 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).
3.2.10 IMPROPER NEUTRALIZATION OF CRLF SEQUENCES IN HTTP HEADERS (‘HTTP REQUEST/RESPONSE SPLITTING’) CWE-113
An improper neutralization of crlf sequences in http headers (‘http response splitting’) in Fortinet FortiOS 7.2.0 through 7.6.0, FortiProxy 7.2.0 through 7.4.5 allows attacker to execute unauthorized code or commands via crafted HTTP header.
CVE-2024-54021 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L).
3.3 BACKGROUND
- CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
Siemens reported these vulnerabilities to CISA.
4. MITIGATIONS
Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:
- RUGGEDCOM APE1808: Contact customer support to receive patch and update information.
As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.
Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage
For more information see the associated Siemens security advisory SSA-770770 in HTML and CSAF.
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, such as:
- Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
- Locate control system networks and remote devices behind firewalls and isolating them from business networks.
- When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the connected devices.
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
- Do not click web links or open attachments in unsolicited email messages.
- Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
- Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.
No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time.
5. UPDATE HISTORY
- February 13, 2025: Initial Publication
