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
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
39.9%
Successful exploitation of these vulnerabilities could lead the application to crash or allow arbitrary code execution.
The following versions of JT Open Toolkit (JTTK), an application programming interface, and JT Utilities, a series of command line utilities, are affected:
JTTK library in affected products is vulnerable to an out-of-bounds write past the end of an allocated structure while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process.
CVE-2021-44430 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
JTTK library in affected products is vulnerable to an out-of-bounds read past the end of an allocated buffer when parsing specially crafted JT files. This could allow an attacker to leak information in the context of the current process.
CVE-2021-44431 has been assigned to this vulnerability. A CVSS v3 base score of 3.3 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N).
JTTK library in affected products is vulnerable to stack-based buffer overflow while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process.
CVE-2021-44432 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
JTTK library in affected products contains a use after free vulnerability that could be triggered while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process.
CVE-2021-44433 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
JTTK library in affected products is vulnerable to an out-of-bounds write past the end of an allocated structure while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process.
CVE-2021-44434 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
JTTK library in affected products is vulnerable to stack-based buffer overflow while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process.
CVE-2021-44435 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
JTTK library in affected products is vulnerable to an out-of-bounds read past the end of an allocated buffer when parsing specially crafted JT files. This could allow an attacker to leak information in the context of the current process.
CVE-2021-44436 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
JTTK library in affected products is vulnerable to an out-of-bounds write past the end of an allocated structure while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process.
CVE-2021-44437 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
JTTK library in affected products is vulnerable to an out-of-bounds write past the end of an allocated structure while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process.
CVE-2021-44438 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
JTTK library in affected products is vulnerable to an out-of-bounds read past the end of an allocated buffer when parsing specially crafted JT files. This could allow an attacker to leak information in the context of the current process.
CVE-2021-44439 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
JTTK library in affected products is vulnerable to memory corruption condition while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process.
CVE-2021-44440 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
JTTK library in affected products contains an out-of-bounds write past the end of an allocated structure while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process.
CVE-2021-44441 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
JTTK library in affected products contains an out-of-bounds write past the fixed-length heap-based buffer while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process.
CVE-2021-44442 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
JTTK library in affected products contains an out-of-bounds write past the end of an allocated structure while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process.
CVE-2021-44443 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
JTTK library in affected products is vulnerable to an out-of-bounds read past the end of an allocated buffer when parsing specially crafted JT files. This could allow an attacker to leak information in the context of the current process.
CVE-2021-44444 has been assigned to this vulnerability. A CVSS v3 base score of 3.3 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N).
JTTK library in affected products contains an out-of-bounds write past the fixed-length heap-based buffer while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process.
CVE-2021-44445 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Bentley Systems Incorporated coordinated these vulnerabilities with Siemens.
Siemens has released an update for the following versions:
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 Siemensβ operational guidelines for Industrial Security and following the recommendations in the product manuals.
For more information about this issue, please see Siemens security advisory SSA-802578
For further inquiries on security vulnerabilities in Siemens products and solutions, please contact Siemens ProductCERT.
CISA recommends users take defensive measures to minimize the risk of exploitation of t these vulnerabilities. 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 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-12-146-01BβTargeted 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-2021-44430
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44431
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44432
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44433
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44434
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44435
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44436
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44437
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44438
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44439
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44440
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44441
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44442
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44443
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44444
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-44445
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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
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
39.9%