OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service by authenticated remote attacker via sending a certific…

Published 9 y ago 2017-06-27 · modified 4 mo ago 2026-06-17 · JSON

CVSS

6.5

v3.0 · NVD

CISA KEV

not known exploited

EPSS

5.5%

percentile 93%

Public exploits

none known

OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service by authenticated remote attacker via sending a certificate with an embedded NULL character.

Exploit prediction (EPSS)

5.54% probability of exploitation in the next 30 days, higher than 93% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.0	6.5	`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`
NVD	2.0	4.0	`AV:N/AC:L/Au:S/C:N/I:N/A:P`

Affected products

OpenVPN Technologies, Inc OpenVPN

Classification

Weakness

CWE-20 Improper Input Validation
CWE-476 NULL Pointer Dereference

References

community.openvpn.net /openvpn/wiki/VulnerabilitiesFixedInOpenVPN243 · x_refsource_CONFIRM, x_transferred
securitytracker.com /id/1038768 · vdb-entry, x_refsource_SECTRACK, x_transferred
securityfocus.com /bid/99230 · vdb-entry, x_refsource_BID, x_transferred

Sources

CVE List: CVE-2017-7522
NVD: CVE-2017-7522

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