CVE-2020-14145

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.

CVSS breakdown

Affected products

• NetApp / active_iq_unified_manager9.5 –
• NetApp / aff_a700s_firmware
• NetApp / hci_compute_node
• NetApp / hci_management_node
• NetApp / hci_storage_node
• NetApp / ONTAP Select Deploy administration utility
• NetApp / solidfire
• NetApp / steelstore_cloud_integrated_storage
• OpenBSD / OpenSSH8.5 – 8.5
• OpenBSD / OpenSSH8.6 – 8.6
• OpenBSD / OpenSSH8.4 – 8.4
• OpenBSD / OpenSSH5.7 – 8.4

References

• MISChttps://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1
• MISChttps://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/
• MISChttps://security.netapp.com/advisory/ntap-20200709-0004/
• MAILING_LISThttp://www.openwall.com/lists/oss-security/2020/12/02/1
• MISChttps://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d
• MISChttps://docs.ssh-mitm.at/CVE-2020-14145.html
• MISChttps://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py
• MISChttps://security.gentoo.org/glsa/202105-35