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Critical severity · published Apr 3, 2020
CVE-2020-6994
A buffer overflow vulnerability was found in some devices of Hirschmann Automation and Control HiOS and HiSecOS
9.8
CVSS
1.6%
EPSS
No
On KEV
Description
A buffer overflow vulnerability was found in some devices of Hirschmann Automation and Control HiOS and HiSecOS. The vulnerability is due to improper parsing of URL arguments. An attacker could exploit this vulnerability by specially crafting HTTP requests to overflow an internal buffer. The following devices using HiOS Version 07.0.02 and lower are affected: RSP, RSPE, RSPS, RSPL, MSP, EES, EES, EESX, GRS, OS, RED. The following devices using HiSecOS Version 03.2.00 and lower are affected: EAGLE20/30.
CVSS vector
CVSS:3.1/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)1.6% · higher than 76% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HH
Hirschmann Hios · Belden
through 07.0.02 · source: NVD
HH
Hirschmann Hisecos · Belden
through 03.2.00 · source: NVD
Affected product
HH
Hirschmann Hios
Belden
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-6994
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-6994
Mitigation
https://www.us-cert.gov/ics/advisories/icsa-20-091-01
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