Critical severity · published Feb 5, 2019
CVE-2018-3991
An exploitable heap overflow vulnerability exists in the WkbProgramLow function of WibuKey Network server management, version 6.40.2402.500
9.8
CVSS
34.3%
EPSS
No
On KEV
Description
An exploitable heap overflow vulnerability exists in the WkbProgramLow function of WibuKey Network server management, version 6.40.2402.500. A specially crafted TCP packet can cause a heap overflow, potentially leading to remote code execution. An attacker can send a malformed TCP packet to trigger this vulnerability.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)34.3% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SW
Simatic Wincc Open Architecture · Siemens
3.14; 3.15; 3.16 · source: NVD
WI
Wibukey · Wibu
6.40.2402.500 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-3991
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-3991
Third Party Advisory
http://www.securityfocus.com/bid/107005
Mitigation
https://cert-portal.siemens.com/productcert/pdf/ssa-760124.pdf
Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-844562.pdf
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/pdf/ssa-902727.pdf
Exploit
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0659
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