Paramiko SSH Server up to 2.4.0 transport.py improper authentication
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
7.9 | $0-$5k | 0.05 |
A vulnerability was found in Paramiko SSH Server up to 2.4.0 (SSH Server Software). It has been declared as critical. Affected by this vulnerability is some unknown functionality of the file transport.py. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:
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.
The bug was discovered 03/13/2018. The weakness was disclosed 03/13/2018 by Matt (GitHub Repository). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2018-7750 since 03/07/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.
It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 109057 (Scientific Linux Security Update : python-paramiko on SL6.x (noarch)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Scientific Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351220 (Amazon Linux Security Advisory for python-paramiko: ALAS-2018-989).
Upgrading to version 1.17.6, 1.18.5, 2.0.8, 2.1.5, 2.2.3, 2.3.2 or 2.4.1 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.
The vulnerability is also documented in the databases at Tenable (109057) and Exploit-DB (45712).
Product
Type
Vendor
Name
Version
- 1.17.0
- 1.17.1
- 1.17.2
- 1.17.3
- 1.17.4
- 1.17.5
- 1.18.0
- 1.18.1
- 1.18.2
- 1.18.3
- 1.18.4
- 2.0
- 2.0.0
- 2.0.1
- 2.0.2
- 2.0.3
- 2.0.4
- 2.0.5
- 2.0.6
- 2.0.7
- 2.1
- 2.1.0
- 2.1.1
- 2.1.2
- 2.1.3
- 2.1.4
- 2.2
- 2.2.0
- 2.2.1
- 2.2.2
- 2.3
- 2.3.0
- 2.3.1
- 2.4
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 8.5VulDB Meta Temp Score: 7.9
VulDB Base Score: 7.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 9.8
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Improper authenticationCWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
Nessus ID: 109057
Nessus Name: Scientific Linux Security Update : python-paramiko on SL6.x (noarch)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 66394
OpenVAS Name: SuSE Update for python-paramiko openSUSE-SU-2018:0799-1 (python-paramiko)
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Exploit-DB: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Upgrade: SSH Server 1.17.6/1.18.5/2.0.8/2.1.5/2.2.3/2.3.2/2.4.1
Patch: github.com
Timeline
03/07/2018 🔍03/13/2018 🔍
03/13/2018 🔍
03/13/2018 🔍
03/13/2018 🔍
03/14/2018 🔍
04/12/2018 🔍
04/16/2018 🔍
02/21/2023 🔍
Sources
Advisory: RHSA-2018:0591Researcher: Matt
Status: Not defined
Confirmation: 🔍
CVE: CVE-2018-7750 (🔍)
SecurityFocus: 103713 - Paramiko CVE-2018-7750 Authentication Bypass Vulnerability
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 03/14/2018 09:37Updated: 02/21/2023 16:45
Changes: 03/14/2018 09:37 (76), 01/13/2020 09:28 (10), 02/21/2023 16:45 (5)
Complete: 🔍
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