CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
85.2%
This updated advisory is a follow-up to the original advisory titled Siemens JT2Go and Teamcenter Visualization that was published February 9, 2021, to the ICS webpage on us-cert.cisa.gov.
Successful exploitation of these vulnerabilities could lead to arbitrary code execution.
The following products are affected:
--------- Begin Update A Part 1 of 1 ---------
CVE-2020-26998, CVE-2020-26999, CVE-2020-27001, CVE-2020-27002, and CVE-2020-26991 were moved to SSA-695540 and ICSA-21-147-04
Affected applications lack proper validation of user-supplied data when parsing PAR files. This could result in an out-of-bounds write past the end of an allocated structure. An attacker could leverage this vulnerability to execute code in the context of the current process.
CVE-2020-26989 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Affected applications lack proper validation of user-supplied data when parsing ASM files. A crafted ASM file can trigger a type of confusion condition. An attacker could leverage this vulnerability to execute code in the context of the current process.
CVE-2020-26990 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Affected applications lack proper validation of user-supplied data when parsing PAR files. This can result in an out-of-bounds write past the memory location that is a read-only image address. An attacker could leverage this vulnerability to execute code in the context of the current process.
CVE-2020-28383 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
An out-of-bounds write vulnerability exists in the file-reading procedure in Open Design Alliance Drawings SDK before 2021.6. This could allow an attacker to cause a crash, potentially enabling a denial-of-service attack (crash, exit, or restart) or code execution.
CVE-2021-31784 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
--------- End Update A Part 1 of 1 ---------
Affected applications lack proper validation of user-supplied data when parsing BMP files. This can result in a memory-corruption condition. An attacker could leverage this vulnerability to execute code in the context of the current process.
CVE-2020-27000 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Affected applications lack proper validation of user-supplied data when parsing TIFF files. This could lead to pointer dereferences of a value obtained from untrusted source. An attacker could leverage this vulnerability to execute code in the context of the current process.
CVE-2020-27003 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Affected applications lack proper validation of user-supplied data when parsing CGM files. This could result in a memory access past the end of an allocated buffer. An attacker could leverage this vulnerability to access data in the context of the current process.
CVE-2020-27004 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Affected applications lack proper validation of user-supplied data when parsing TGA files. This could result in an out-of-bounds write past the end of an allocated structure. An attacker could leverage this vulnerability to execute code in the context of the current process.
CVE-2020-27005 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Affected applications lack proper validation of user-supplied data when parsing PCT files. This could result in a memory-corruption condition. An attacker could leverage this vulnerability to execute code in the context of the current process.
CVE-2020-27006 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Affected applications lack proper validation of user-supplied data when parsing HPG files. This could result in a memory access past the end of an allocated buffer. An attacker could leverage this vulnerability to access data in the context of the current process.
CVE-2020-27007 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Affected applications lack proper validation of user-supplied data when parsing PLT files. This could result in a memory access past the end of an allocated buffer. An attacker could leverage this vulnerability to access data in the context of the current process.
CVE-2020-27008 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Affected applications lack proper validation of user-supplied data when parsing RAS files. This could result in a memory access past the end of an allocated buffer. An attacker could leverage this vulnerability to access data in the context of the current process.
CVE-2020-28394 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Affected applications lack proper validation of user-supplied data when parsing PAR files. This could result in an out-of-bounds write past the end of an allocated structure. An attacker could leverage this vulnerability to execute code in the context of the current process.
CVE-2020-26989 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Affected applications lack proper validation of user-supplied data when parsing ASM files. A crafted ASM file can trigger a type-confusion condition. An attacker can leverage this vulnerability to execute code in the context of the current process.
CVE-2020-26990 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
An issue was discovered in Open Design Alliance Drawings SDK before v2021.11. A stack-based buffer overflow vulnerability exists when the recover operation is run with malformed DXF and DWG files.
CVE-2021-25178 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
An issue was discovered in Open Design Alliance Drawings SDK before v2021.11. A type-confusion issue exists when rendering malformed DXF and DWG files.
CVE-2021-25177 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
An issue was discovered in Open Design Alliance Drawings SDK before v2021.11. A NULL pointer dereference exists when rendering malformed DXF and DWG files. This could allow attackers to cause a crash, potentially enabling a denial-of-service attack (crash, exit, or restart).
CVE-2021-25176 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
An issue was discovered in Open Design Alliance Drawings SDK before v2021.11. A type conversion issue exists when rendering malformed DXF and DWG files. This could allow attackers to cause a crash, potentially enabling a denial-of-service attack (crash, exit, or restart).
CVE-2021-25175 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
An issue was discovered in Open Design Alliance Drawings SDK before v2021.12. A memory corruption vulnerability exists when reading malformed DGN files. This could allow attackers to cause a crash, enabling a denial-of-service condition (crash, exit, or restart).
CVE-2021-25174 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
An issue was discovered in Open Design Alliance Drawings SDK before v2021.12. A memory allocation with excessive size vulnerability exists when reading malformed DGN files, which could allow attackers to cause a crash, enabling a denial-of-service condition (crash, exit, or restart).
CVE-2021-25173 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Michael DePlante (@izobashi), Francis Provencher {PRL}, and rgod, working with Trend Micro’s Zero Day Initiative, reported these vulnerabilities to CISA.
Siemens recommends the following:
Siemens strongly 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 follow the recommendations in the product manuals.
Additional information on industrial security by Siemens can be found at: <https://www.siemens.com/Industrialsecurity>
CISA recommends users take the following measures to protect themselves from social engineering attacks:
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. These vulnerabilities are not exploitable remotely.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-26989
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-26989
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-26990
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-26990
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-26991
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-26998
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-26999
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-27000
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-27001
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-27002
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-27003
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-27004
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-27005
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-27006
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-27007
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-27008
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-28383
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-28394
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-25173
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-25174
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-25175
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-25176
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-25177
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-25178
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-31784
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CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
85.2%