High severity · published Dec 29, 2020
CVE-2020-5802
An attacker-controlled memory allocation size can be passed to the C++ new operator in RnaDaSvr.dll by sending a specially crafted ConfigureItems message to TCP port 4241
7.5
CVSS
44.7%
EPSS
No
On KEV
Description
An attacker-controlled memory allocation size can be passed to the C++ new operator in RnaDaSvr.dll by sending a specially crafted ConfigureItems message to TCP port 4241. This will cause an unhandled exception, resulting in termination of RSLinxNG.exe. Observed in FactoryTalk 6.11. All versions of FactoryTalk Linx are affected.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)44.7% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FL
Factorytalk Linx · Rockwellautomation
through 6.11 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-5802
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-5802
Third Party Advisory
https://www.tenable.com/security/research/tra-2020-71
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