CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
76.1%
These vulnerabilities could allow an attacker to deny the acquisition of a valid license for legal use of the product. The memory corruption vulnerability could allow remote code execution.
The following versions of FlexNet Publisher, a software license manager, are affected:
A vulnerability related to preemptive item deletion in lmgrd and vendor daemon components allows a remote attacker to send a combination of messages to lmgrd or the vendor daemon, causing the heartbeat between lmgrd and the vendor daemon to stop and the vendor daemon to shut down.
CVE-2018-20031 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
A vulnerability related to message decoding in lmgrd and vendor daemon components allows a remote attacker to send a combination of messages to lmgrd or the vendor daemon, causing the heartbeat between lmgrd and the vendor daemon to stop and the vendor daemon to shut down.
CVE-2018-20032 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
A vulnerability in lmgrd and vendor daemon components could allow a remote attacker to corrupt the memory by allocating/deallocating memory, loading lmgrd or the vendor daemon, and causing the heartbeat between lmgrd and the vendor daemon to stop. This would force the vendor daemon to shut down. The vulnerability could also allow remote code execution. No exploit of this vulnerability has been demonstrated.
CVE-2018-20033 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
A vulnerability related to adding an item to a list in lmgrd and vendor daemon components allows a remote attacker to send a combination of messages to lmgrd or the vendor daemon, causing the heartbeat between lmgrd and the vendor daemon to stop and the vendor daemon to shut down.
CVE-2018-20034 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Sergey Temnikov of Kaspersky reported these vulnerabilities to CISA.
Flexera recommends all users using affected versions of FlexNet Publisher upgrade to Version 2018 R4 or newer as soon as possible. The updates can be obtained with a customer account at the following location (login required):
More information on this issue can be found at the following location on the Flexera site:
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.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.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-2018-20031
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-20032
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-20033
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-20034
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CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
76.1%