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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1 ↗
- https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/ ↗
- https://security.netapp.com/advisory/ntap-20200709-0004/ ↗
- http://www.openwall.com/lists/oss-security/2020/12/02/1 ↗
- https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d ↗
- https://docs.ssh-mitm.at/CVE-2020-14145.html ↗
- https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py ↗
- https://security.gentoo.org/glsa/202105-35 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html ↗