CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
59.4%
Successful exploitation of these vulnerabilities could allow an authenticated remote attacker to execute arbitrary code on the system, with system privileges, under certain conditions.
The following versions of Siemens SINEC NMS software are affected:
The affected system has a path traversal vulnerability when exporting a firmware container, which could allow a privileged, authenticated attacker to create arbitrary files on an affected system.
CVE-2021-33722 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
An authenticated attacker could change the user profile of any user without proper authorization, which could allow an attacker to change the password of any user in the affected system.
CVE-2021-33723 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
The affected system contains an arbitrary file deletion vulnerability that could allow an attacker to delete an arbitrary file or directory under a user-controlled path.
CVE-2021-33724 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
The affected system allows the deletion of arbitrary files or directories under a user-controlled path and does not correctly check if the relative path is still within the intended target directory.
CVE-2021-33725 has been assigned to this vulnerability. A CVSS v3 base score of 4.9 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).
The affected system allows to download arbitrary files under a user-controlled path and does not correctly check if the relative path is still within the intended target directory.
CVE-2021-33726 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).
An authenticated attacker could download the user profile of any user, allowing an attacker to leak confidential information.
CVE-2021-33727 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).
The affected system allows uploading JSON objects that are deserialized to Java objects. Due to insecure deserialization of user-supplied content by the affected software, a privileged attacker could exploit this vulnerability by sending a crafted serialized Java object.
CVE-2021-33728 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
An authenticated attacker could import firmware containers to an affected system and execute arbitrary commands in the local database.
CVE-2021-33729 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
A privileged, authenticated attacker could execute arbitrary commands in the local database by sending crafted requests to the web server of the affected application.
CVE-2021-33730 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
A privileged authenticated attacker could execute arbitrary commands in the local database by sending crafted requests to the web server of the affected application.
CVE-2021-33731 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
A privileged, authenticated attacker could execute arbitrary commands in the local database by sending crafted requests to the web server of the affected application.
CVE-2021-33732 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
A privileged, authenticated attacker could execute arbitrary commands in the local database by sending crafted requests to the web server of the affected application.
CVE-2021-33733 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
A privileged, authenticated attacker could execute arbitrary commands in the local database by sending crafted requests to the web server of the affected application.
CVE-2021-33734 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
A privileged, authenticated attacker could execute arbitrary commands in the local database by sending crafted requests to the web server of the affected application.
CVE-2021-33735 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
A privileged, authenticated attacker could execute arbitrary commands in the local database by sending crafted requests to the web server of the affected application.
CVE-2021-33736 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
Claroty’s Noam Moshe reported these vulnerabilities to Siemens.
Siemens has released an update for SINEC NMS and recommends updating to the latest version: v1.0 SP2 Update 1 or later.
Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:
As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security, and following the recommendations in the product manuals.
Additional information on industrial security by Siemens can be found at: <https://www.siemens.com/industrialsecurity>
For additional information, please refer to Siemens Security Advisory SSA-163251
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
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 us-cert.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 us-cert.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.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33722
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33723
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33724
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33725
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33726
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33727
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33728
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33729
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33730
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33731
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33732
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33733
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33734
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33735
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33736
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CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
59.4%