Auth bypass in Paramiko
CVE-2018-7750
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.271 (98.0th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.271 · newest: 0.271 · change: 0.000
Affected products
- Paramiko — versions 2.4.0
- Debian Linux — versions 8.0, 9.0
- Red Hat Ansible Engine — versions 2.0, 2.4
- Red Hat Cloudforms — versions 4.5, 4.6
- Red Hat Enterprise Linux Desktop — versions 6.0
- Red Hat Enterprise Linux Server — versions 6.0, 7.0
- Red Hat Enterprise Linux Server Aus — versions 6.4, 6.5, 6.6
- Red Hat Enterprise Linux Server Eus — versions 6.7
- Red Hat Enterprise Linux Server Tus — versions 6.6
- Red Hat Enterprise Linux Workstation — versions 6.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2018:1124 (vendor-advisory, Third Party Advisory)
- www.exploit-db.com/exploits/45712/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- github.com/paramiko/paramiko/issues/1175 (Third Party Advisory, Issue Tracking)
- access.redhat.com/errata/RHSA-2018:1125 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1972 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1274 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/10/msg00018.html (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/3603-2/ (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:0646 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1213 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-7750?
- CVE-2018-7750 is a critical-severity vulnerability in Paramiko, classified under Improper Authentication. CVSS score: 9.8/10. Published 2018-03-13.
- How severe is CVE-2018-7750?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2018-7750 known to be exploited?
- 11 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.