High severity · published Jul 29, 2020
CVE-2020-5763
Grandstream HT800 series firmware version 1.0.17.5 and below contain a backdoor in the SSH service
8.8
CVSS
2.7%
EPSS
No
On KEV
Description
Grandstream HT800 series firmware version 1.0.17.5 and below contain a backdoor in the SSH service. An authenticated remote attacker can obtain a root shell by correctly answering a challenge prompt.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.7% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HF
Ht801 Firmware · Grandstream
through 1.0.17.5 · source: NVD
HF
Ht802 Firmware · Grandstream
through 1.0.17.5 · source: NVD
HF
Ht812 Firmware · Grandstream
through 1.0.17.5 · source: NVD
HF
Ht813 Firmware · Grandstream
through 1.0.17.5 · source: NVD
HF
Ht814 Firmware · Grandstream
through 1.0.17.5 · source: NVD
HF
Ht818 Firmware · Grandstream
through 1.0.17.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-5763
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-5763
Exploit
https://www.tenable.com/security/research/tra-2020-43
Third Party Advisory
https://www.tenable.com/security/research/tra-2020-47
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