Summary
Successful exploitation of these vulnerabilities could allow an attacker to disclose sensitive information, cause a denial of service, or potentially execute arbitrary code.
Vulnerabilities 4
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High 8.8
o6 Automation open62541 Integer Overflow or Wraparound
An integer overflow in the UA_Variant arrayDimensions product computation in open62541 may allow a remote attacker to trigger an out-of-bounds write.
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High 8.1
o6 Automation open62541 Use After Free
A heap use-after-free vulnerability in the TransferSubscriptions service in open62541 may allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code.
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High 7.5
o6 Automation open62541 Integer Overflow or Wraparound
An integer overflow in the UA_Variant arrayDimensions product computation in open62541 may allow a remote attacker to read out-of-bounds heap memory, potentially disclosing sensitive information.
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Medium 5.9
o6 Automation open62541 Integer Underflow
An unsigned integer underflow in the PubSub signature verification path in open62541 may allow a remote attacker to cause a denial of service via a crafted UDP packet.
Revision history
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#1
Initial Publication
References
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ICSA Advisory ICSA-26-211-08 - Web Version
https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-08
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Recommended Practices
https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
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Recommended Practices
https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
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Recommended Practices
https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf
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Recommended Practices
https://www.cisa.gov/topics/industrial-control-systems
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Recommended Practices
https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01
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Recommended Practices
https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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Recommended Practices
https://www.cisa.gov/news-events/news/targeted-cyber-intrusion-detection-and-mitigation-strategies-update-b
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Recommended Practices
https://www.cisa.gov/secure-our-world/teach-employees-avoid-phishing
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Recommended Practices
https://www.cisa.gov/news-events/news/avoiding-social-engineering-and-phishing-attacks