What’s Vulnerable › Vulnerabilities

CVE-2011-3143

• Severity: critical (CVSS 10.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 7.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2011-08-16 · updated 2026-06-16
• Weakness: CWE-399

Description

Use-after-free vulnerability in Control Microsystems ClearSCADA 2005, 2007, and 2009 before R2.3 and R1.4, as used in SCX before 67 R4.5 and 68 R3.9, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified long strings that trigger heap memory corruption.

Affected products

• Schneider Electric SE ClearSCADA: 2005, 2007, 2009
• Schneider-Electric Scx 67: before r4.5 — fixed in r4.5
• Schneider-Electric Scx 68: before r3.9 — fixed in r3.9

How to fix

Upgrade to a fixed version: Schneider-Electric Scx 67 r4.5; Schneider-Electric Scx 68 r3.9. Check the vendor advisory for mitigations.

References

• http://secunia.com/advisories/44955
• http://www.digitalbond.com/scadapedia/vulnerability-notes/heap-overflow-vulnerability/
• http://www.osvdb.org/72989
• http://www.securityfocus.com/bid/46312
• http://www.us-cert.gov/control_systems/pdf/ICSA-10-314-01.pdf
• http://www.us-cert.gov/control_systems/pdf/ICSA-10-314-01A.pdf
• http://secunia.com/advisories/44955
• http://www.digitalbond.com/scadapedia/vulnerability-notes/heap-overflow-vulnerability/
• http://www.osvdb.org/72989
• http://www.securityfocus.com/bid/46312
• http://www.us-cert.gov/control_systems/pdf/ICSA-10-314-01.pdf
• http://www.us-cert.gov/control_systems/pdf/ICSA-10-314-01A.pdf

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