CVE-2020-14145
OpenSSH Observable Discrepancy Information Leak
Description
The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client). NOTE: some reports state that 8.5 and 8.6 are also affected.
INFO
Published Date :
June 29, 2020, 6:15 p.m.
Last Modified :
April 28, 2022, 7:34 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.2
Public PoC/Exploit Available at Github
CVE-2020-14145 has a 14 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2020-14145
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-14145.
| URL | Resource |
|---|---|
| http://www.openwall.com/lists/oss-security/2020/12/02/1 | Mailing List Patch Third Party Advisory |
| https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d | Patch Third Party Advisory |
| https://docs.ssh-mitm.at/CVE-2020-14145.html | Third Party Advisory |
| https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1 | Patch Third Party Advisory |
| https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py | Third Party Advisory |
| https://security.gentoo.org/glsa/202105-35 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20200709-0004/ | Third Party Advisory |
| https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/ | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
DockerLab - Machine
Máquina DockerLab
None
None
Dockerfile Python Shell C
Ubuntu container with GMT timezone, GB locale and additional tools preinstalled.
Dockerfile Shell
Walkthrough and Writeups for the HackTheBox Penetration Lab Testing Environment
Easily scan for CVEs using nmap.
cve nmap portscanning shell shellscript automation
Shell
External Penetration Testing - Holo Corporate Network - TryHackMe - Holo Network
penetration-testing pentest pentesting
None
None
DC-2 is a purposely built vulnerable lab for the purpose of gaining experience in the world of penetration testing. It was designed to be a challenge for beginners, but just how easy it is will depend on your skills and knowledge, and your ability to learn. To successfully complete this challenge, you will require Linux skills, familiarity with the Linux command line and experience with basic penetration testing tools, such as the tools that can be found on Kali Linux, or Parrot Security OS.
DC-1 is a purposely built vulnerable lab for the purpose of gaining experience in the world of penetration testing. It was designed to be a challenge for beginners, but just how easy it is will depend on your skills and knowledge, and your ability to learn.
This is a boot2root VM and is a continuation of the Basic Pentesting series. This series is designed to help newcomers to penetration testing develop pentesting skills and have fun exploring part of the offensive side of security. VirtualBox is the recommended platform for this challenge (though it should also work with VMware -- however, I haven’t tested that). This VM is a moderate step up in difficulty from the first entry in this series. If you’ve solved the first entry and have tried a few other beginner-oriented challenges, this VM should be a good next step. Once again, this challenge contains multiple initial exploitation vectors and privilege escalation vulnerabilities. Your goal is to remotely attack the VM, gain root privileges, and read the flag located at /root/flag.txt. Once you’ve finished, try to find other vectors you might have missed! If you’d like to send me a link to your writeup, enjoyed the VM or have questions or feedback, feel free to contact me at: [email protected] If you finished the VM, please also consider posting a writeup! Writeups help you internalize what you worked on and help anyone else who might be struggling or wants to see someone else’s process. There were lots of wonderful writeups for Basic Pentesting: 1, and I look forward to reading the writeups for this challenge.
This is walkthrough of another Boot2Root Vulnhub machine ! This can be a real life scenario if rockies becomes admins. Easy going in round about 15 mins.
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-14145 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-14145 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Apr. 28, 2022
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202105-35 No Types Assigned https://security.gentoo.org/glsa/202105-35 Third Party Advisory -
CWE Remap by [email protected]
Jul. 21, 2021
Action Type Old Value New Value Changed CWE CWE-200 CWE-203 -
CVE Modified by [email protected]
May. 26, 2021
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202105-35 [No Types Assigned] -
Modified Analysis by [email protected]
May. 24, 2021
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* versions from (including) 5.7 up to (excluding) 8.4 *cpe:2.3:a:openbsd:openssh:8.4:-:*:*:*:*:*:* OR *cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* versions from (including) 5.7 up to (excluding) 8.4 *cpe:2.3:a:openbsd:openssh:8.4:-:*:*:*:*:*:* *cpe:2.3:a:openbsd:openssh:8.5:-:*:*:*:*:*:* *cpe:2.3:a:openbsd:openssh:8.6:-:*:*:*:*:*:* -
CVE Modified by [email protected]
May. 24, 2021
Action Type Old Value New Value Changed Description The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client). The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client). NOTE: some reports state that 8.5 and 8.6 are also affected. -
Modified Analysis by [email protected]
Feb. 25, 2021
Action Type Old Value New Value Changed Reference Type https://docs.ssh-mitm.at/CVE-2020-14145.html No Types Assigned https://docs.ssh-mitm.at/CVE-2020-14145.html Third Party Advisory Changed Reference Type https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py No Types Assigned https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py Third Party Advisory -
CVE Modified by [email protected]
Feb. 12, 2021
Action Type Old Value New Value Changed Description The client side in OpenSSH 5.7 through 8.3 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client). The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client). Added Reference https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py [No Types Assigned] Added Reference https://docs.ssh-mitm.at/CVE-2020-14145.html [No Types Assigned] -
Reanalysis by [email protected]
Feb. 11, 2021
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* versions from (including) 5.7 up to (including) 8.4 OR *cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* versions from (including) 5.7 up to (excluding) 8.4 *cpe:2.3:a:openbsd:openssh:8.4:-:*:*:*:*:*:* -
Modified Analysis by [email protected]
Feb. 11, 2021
Action Type Old Value New Value Changed Reference Type http://www.openwall.com/lists/oss-security/2020/12/02/1 No Types Assigned http://www.openwall.com/lists/oss-security/2020/12/02/1 Mailing List, Patch, Third Party Advisory Changed Reference Type https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d No Types Assigned https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d Patch, Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20200709-0004/ No Types Assigned https://security.netapp.com/advisory/ntap-20200709-0004/ Third Party Advisory Changed CPE Configuration OR *cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* versions from (including) 5.7 up to (including) 8.3 OR *cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* versions from (including) 5.7 up to (including) 8.4 Added CPE Configuration AND OR *cpe:2.3:o:netapp:aff_a700s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:aff_a700s:-:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:netapp:active_iq_unified_manager:*:*:*:*:*:vmware_vsphere:*:* versions from (including) 9.5 *cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:* *cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:* *cpe:2.3:h:netapp:hci_storage_node:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Dec. 02, 2020
Action Type Old Value New Value Added Reference https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d [No Types Assigned] -
CVE Modified by [email protected]
Dec. 02, 2020
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2020/12/02/1 [No Types Assigned] -
CVE Modified by [email protected]
Jul. 09, 2020
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20200709-0004/ [No Types Assigned] -
Initial Analysis by [email protected]
Jul. 06, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1 No Types Assigned https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1 Patch, Third Party Advisory Changed Reference Type https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/ No Types Assigned https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/ Third Party Advisory Added CWE NIST CWE-200 Added CPE Configuration OR *cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* versions from (including) 5.7 up to (including) 8.3
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-14145 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-14145
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.32 }} -0.00%
score
0.71047
percentile