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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.2352 Advisory (icsa-22-132-02) Mitsubishi Electric MELSOFT iQ AppPortal 13 May 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Mitsubishi Electric MELSOFT iQ AppPortal Publisher: ICS-CERT Operating System: Network Appliance Resolution: Patch/Upgrade CVE Names: CVE-2022-23943 CVE-2022-22720 CVE-2022-0778 CVE-2021-44790 CVE-2021-34798 CVE-2021-26691 CVE-2021-3711 CVE-2020-13938 Original Bulletin: https://us-cert.cisa.gov/ics/advisories/icsa-22-132-02 Comment: CVSS (Max): 9.8 CVE-2022-23943 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) CVSS Source: ICS-CERT Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-22-132-02) Mitsubishi Electric MELSOFT iQ AppPortal Original release date: May 12, 2022 Legal Notice All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 9.8 o ATTENTION: Exploitable remotely/low attack complexity o Vendor: Mitsubishi Electric o Equipment: MELSOFT iQ AppPortal o Vulnerabilities: Missing Authorization, Out-of-bounds Write, NULL Pointer Dereference, Classic Buffer Overflow, HTTP Request Smuggling, Infinite Loop 2. RISK EVALUATION Successful exploitation of these vulnerabilities could result in a denial-of-service condition, malicious program execution, information disclosure, information tampering, or authentication bypass. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following MELSOFT iQ AppPortal versions using the vulnerable open-source software used by VisualSVN Server, are affected: o MELSOFT iQ AppPortal (SW1DND-IQAPL-M): Versions 1.00A through 1.26C 3.2 VULNERABILITY OVERVIEW 3.2.1 MISSING AUTHORIZATION CWE-862 Apache HTTP Server Versions 2.4.0 to 2.4.46 allow unprivileged local users to stop httpd on Windows. CVE-2020-13938 has been assigned to this vulnerability. A CVSS v3 base score of 5.5 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:N/S:U/C:N/ I:N/A:H ). 3.2.2 OUT-OF-BOUNDS WRITE CWE-787 In Apache HTTP Server Versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflow. CVE-2021-26691 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:H/ I:H/A:H ). 3.2.3 NULL POINTER DEREFERENCE CWE-476 Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server Versions 2.4.48 and earlier. CVE-2021-34798 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:N/ I:N/A:H ). 3.2.4 BUFFER COPY WITHOUT CHECKING SIZE OF INPUT ('CLASSIC BUFFER OVERFLOW') CWE-120 An attacker who can present SM2 content for decryption to an application could cause data to overflow the buffer up to a maximum of 62 bytes, altering the contents of other data held after the buffer or causing the application to crash. The location of the buffer is application dependent but is typically heap allocated. Fixed in OpenSSL 1.1.1 (Affected 1.1.1-1.1.1k). This issue is detailed further in CVE-2021-3711 . CVE-2021-3711 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:H/ I:H/A:H ). 3.2.5 OUT-OF-BOUNDS WRITE CWE-787 A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for this vulnerability, though it might be possible to craft one. This issue affects Apache HTTP Server Versions 2.4.51 and earlier. CVE-2021-44790 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:H/ I:H/A:H ). 3.2.6 INCONSISTENT INTERPRETATION OF HTTP REQUESTS ('HTTP REQUEST SMUGGLING') CWE-444 Apache HTTP Server Versions 2.4.52 and earlier fail to close inbound connections when errors are encountered discarding the request body, exposing the server to HTTP request smuggling. CVE-2022-22720 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:H/ I:H/A:H ). 3.2.7 OUT-OF-BOUNDS WRITE CWE-787 An out-of-bounds write vulnerability in mod_sed of Apache HTTP Server allows an attacker to overwrite heap memory with possibly attacker provided data. This issue affects Apache HTTP Server 2.4 Versions 2.4.52 and earlier. CVE-2022-23943 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:H/ I:H/A:H ). 3.2.8 LOOP WITH UNREACHABLE EXIT CONDITION ('INFINITE LOOP') CWE-835 The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop for non-prime moduli. An attacker can use a self-signed certificate to trigger the loop during verification of the certificate signature. This issue, which is further detailed in CVE-2022-0778, affects OpenSSL Versions 1.0.2, 1.1.1, and 3.0.xxx CVE-2022-0778 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:N/ I:N/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Japan 3.4 RESEARCHER Mitsubishi Electric notified CISA of these vulnerabilities. 4. MITIGATIONS Mitsubishi Electric recommends the following: o Update to 1.29F or later . Unzip the downloaded file (zip format) and execute the file "setup.exe." o Restrict network access to the computer running this product so it can be accessed only from trusted networks or hosts. o Minimize user privilege for product users. o Install an antivirus software in the personal computer that runs this product. o Please follow the safety precautions in the operating manual for the product. For more information see Mitsubishi Electric's advisory 2022-003 CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet . o Locate control system networks and remote devices behind firewalls and isolate them from the business network. o When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its 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 recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies . Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies . Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents. No known public exploits specifically target these vulnerabilities. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: https://auscert.org.au/gpg-key/ iQIVAwUBYn2RxckNZI30y1K9AQi8CBAAqUqs25nG50ePscL54RdGJ52VkGxCpn2Y v5+p4mbRSuL6sH6L2EaRfm33tco9gktzcRxtN1XGMODNLIuc2NWH6gqjbT4IY7vu gCkgQScKlJI0FpcAYVQnXwR06xixl9/PtETKno03atkDysb4w9g/2foQEhWH0LmY qudrCzqO7+ez6dfnb8WqaNIhlvRFoNtEvH2NlZMF35k4qprkittc8U8ZQn6kgyXI 0FkOGmAzX6OAkXSRM7OCx1cvNDotcnNpr7bRbix4sW69CI4GUkgW3OKm3CP+6PG1 HUtewOvJDGH/jBq+nxCw+ASkjy8CQItkpKtTla2rAEoy6U7MKoKMtB1V1C0BQuuM U9OaPxQCujfXyrsOl6AD3EeapZQLb0te82iZO6KXnyxHpWzRQB77/b8f/yT7Mxgq LeD1AoFcjV9AeABbqXdVYu/10teNMBTa3st3KucofKH9KGJecrk9OMhvnyHODoGL kaiWCYBla0AFVc1XpVEN8CQ0qmCZTmzAUN0Vnsc55OEMgjtsmaADwLhfkhUXV3TI lSWBUt0rjN5aGE0VTA9X2s7fSUpqRaiMguzajmenCk7dwUBCr1tPttECvRslSgH4 zbbKdOBKmZvvYIf+OHVT+oc1xp1kL5CH70iHLi3Vd20RKIz+YJg+Lc+CnXkB1xto v9IthHgJ8/k= =QUrM -----END PGP SIGNATURE-----