Information Exposure Affecting openssh-ssh1 package, versions *
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Test your applications- Snyk ID SNYK-UBUNTU2004-OPENSSHSSH1-1047873
- published 2 Dec 2020
- disclosed 29 Jun 2020
Introduced: 29 Jun 2020
CVE-2020-14145 Open this link in a new tabHow to fix?
There is no fixed version for Ubuntu:20.04 openssh-ssh1.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openssh-ssh1 package and not the openssh-ssh1 package as distributed by Ubuntu.
See How to fix? for Ubuntu:20.04 relevant fixed versions and status.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2020-14145
- https://security.netapp.com/advisory/ntap-20200709-0004/
- https://security.gentoo.org/glsa/202105-35
- https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d
- https://docs.ssh-mitm.at/CVE-2020-14145.html
- https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1
- https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py
- https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/
- http://www.openwall.com/lists/oss-security/2020/12/02/1