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Vulnerability record · CVE-2018-7750 · published 13 March 2018

CVE-2018-7750: Paramiko improper authentication vulnerability

Paramiko · Paramiko

transport.py in the SSH server implementation of Paramiko before 1.17.6, 1.18.x before 1.18.5, 2.0.x before 2.0.8, 2.1.x before 2.1.5, 2.2.x before 2.2.3, 2.3.x before 2.3.2, and 2.4.x before 2.4.1 does not properly check whether authentication is completed before processing other requests, as demonstrated by channel-open. A customized SSH client can simply skip the authentication step.

9.8 CVSS 3.1 Critical EPSS 27% · top 2.0% CWE-287 · Improper authentication
9.8CVSS 3.1 base score, v2 7.5
27%EPSS exploitation probability, 30 days
NoNot in CISA KEV
11Affected product versions listed by NVD
36References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

transport.py in the SSH server implementation of Paramiko before 1.17.6, 1.18.x before 1.18.5, 2.0.x before 2.0.8, 2.1.x before 2.1.5, 2.2.x before 2.2.3, 2.3.x before 2.3.2, and 2.4.x before 2.4.1 does not properly check whether authentication is completed before processing other requests, as demonstrated by channel-open. A customized SSH client can simply skip the authentication step.

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

Affected products

11 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/103713 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:0591 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0646 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1124 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1125 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1213 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1274 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1328 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1525 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1972 Third Party Advisory
https://github.com/paramiko/paramiko/blob/master/sites/www/changelog.rst Third Party Advisory
https://github.com/paramiko/paramiko/commit/fa29bd8446c8eab237f5187d28787727b4610516 PatchThird Party Advisory
https://github.com/paramiko/paramiko/issues/1175 Issue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00018.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00025.html Mailing ListThird Party Advisory
https://usn.ubuntu.com/3603-1/ Third Party Advisory
https://usn.ubuntu.com/3603-2/ Third Party Advisory
https://www.exploit-db.com/exploits/45712/ ExploitThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/103713 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:0591 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0646 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1124 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1125 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1213 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1274 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1328 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1525 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1972 Third Party Advisory
https://github.com/paramiko/paramiko/blob/master/sites/www/changelog.rst Third Party Advisory
https://github.com/paramiko/paramiko/commit/fa29bd8446c8eab237f5187d28787727b4610516 PatchThird Party Advisory
https://github.com/paramiko/paramiko/issues/1175 Issue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00018.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00025.html Mailing ListThird Party Advisory
https://usn.ubuntu.com/3603-1/ Third Party Advisory
https://usn.ubuntu.com/3603-2/ Third Party Advisory
https://www.exploit-db.com/exploits/45712/ ExploitThird Party AdvisoryVDB Entry

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-7750), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.