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[email protected]CVE-2020-15074

HistoryJul 14, 2020 - 6:15 p.m.

CVE-2020-15074

2020-07-1418:15:00

CWE-613

[email protected]

web.nvd.nist.gov

cve-2020-15074

openvpn

access server

authentication

tokens

security vulnerability

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

7.6 High

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:N/I:P/A:N

0.001 Low

EPSS

Percentile

35.6%

JSON

OpenVPN Access Server older than version 2.8.4 and version 2.9.5 generates new user authentication tokens instead of reusing exiting tokens on reconnect making it possible to circumvent the initial token expiry timestamp.

CPENameOperatorVersion
openvpn:openvpn_access_serveropenvpn openvpn access serverlt2.8.4
openvpn:openvpn_access_serveropenvpn openvpn access serverlt2.9.6

CPE	Name	Operator	Version
openvpn:openvpn_access_server	openvpn openvpn access server	lt	2.8.4
openvpn:openvpn_access_server	openvpn openvpn access server	lt	2.9.6

References

openvpn.net/vpn-server-resources/release-notes/

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

7.6 High

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:N/I:P/A:N

0.001 Low

EPSS

Percentile

35.6%

JSON

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