Information Exposure The advisory has been revoked - it doesn't affect any version of package openssh-ssh1 (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1804-OPENSSHSSH1-1047875
- published2 Dec 2020
- disclosed29 Jun 2020
Introduced: 29 Jun 2020
CVE-2020-14145 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:18.04.
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.
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
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html