CVE-2020-5763

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 v3 8.8 HIGH
CVSS v2.0 9.0 HIGH

8.8^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.0^/10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:N/AC:L/Au:S/C:C/I:C/A:C

Exploitability : 8.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://www.tenable.com/security/research/tra-2020-43	Exploit Third Party Advisory
https://www.tenable.com/security/research/tra-2020-47	Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:grandstream:ht801_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:grandstream:ht801:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:grandstream:ht802_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:grandstream:ht802:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:grandstream:ht812_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:grandstream:ht812:-:*:*:*:*:*:*:*

Configuration 4 (hide)

AND

cpe:2.3:o:grandstream:ht814_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:grandstream:ht814:-:*:*:*:*:*:*:*

Configuration 5 (hide)

AND

cpe:2.3:o:grandstream:ht818_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:grandstream:ht818:-:*:*:*:*:*:*:*

Configuration 6 (hide)

AND

cpe:2.3:o:grandstream:ht813_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:grandstream:ht813:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2020-07-29 19:15

Updated : 2020-07-31 18:14

NVD link : CVE-2020-5763

Mitre link : CVE-2020-5763

CVE.ORG link : CVE-2020-5763

JSON object : View

Products Affected

grandstream

ht818
ht814_firmware
ht801_firmware
ht802_firmware
ht818_firmware
ht813_firmware
ht813
ht812
ht812_firmware
ht801
ht814
ht802

CWE

CWE-326

Inadequate Encryption Strength

CWE-489

Active Debug Code

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An authenticated remote attacker can obtain a root shell by correctly answering a challenge prompt."}, {"lang": "es", "value": "Grandstream serie HT800 versiones de firmware 1.0.17.5 y posteriores, contiene una backdoor en el servicio SSH. Un atacante remoto autenticado puede obtener un root shell cuando responde correctamente una petici\u00f3n de desaf\u00edo"}], "lastModified": "2020-07-31T18:14:23.503", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:grandstream:ht801_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "10C6AE2E-DCBA-471E-AC05-D04021F625CE", "versionEndIncluding": "1.0.17.5"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:grandstream:ht801:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "1338EDFF-1D52-41E1-9378-7D752E622188"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:grandstream:ht802_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1EE48BC4-31F0-4D94-9A1E-C0E83776FDF4", "versionEndIncluding": "1.0.17.5"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:grandstream:ht802:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "A44D9054-2A04-4A48-A270-4B56CD8BA7DD"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:grandstream:ht812_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CF548C51-32DF-4365-9C36-CE1FE17AC207", "versionEndIncluding": "1.0.17.5"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:grandstream:ht812:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "AC0A2572-951D-4384-AF93-D674F3E07788"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:grandstream:ht814_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "59773485-3A12-477B-BF83-C1E0E8C979AD", "versionEndIncluding": "1.0.17.5"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:grandstream:ht814:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "AE769C28-17BB-4570-8239-6393239BE542"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:grandstream:ht818_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0CBC4277-2D62-4C60-A638-851BB92B9A67", "versionEndIncluding": "1.0.17.5"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:grandstream:ht818:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "35BEAB2F-5673-42EC-BA4F-982226C1CB7E"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:grandstream:ht813_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C9E5F102-13D3-47A4-926A-4B67E0742E82", "versionEndIncluding": "1.0.17.5"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:grandstream:ht813:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "76348549-9B8E-4E80-854F-8F8886C6BA59"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "vulnreport@tenable.com"}

8.8 /10