medium5.9
CVE-2020-14145
The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation.
Impact
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
| Vendor | Product | Affected versions |
|---|---|---|
| Openbsd | Openssh | from 5.7 before 8.4 Versions 8.4, 8.5, 8.6 |
| Netapp | Aff A700s Firmware | All versions |
| Netapp | Active Iq Unified Manager | from 9.5 |
| Netapp | Hci Management Node | All versions |
| Netapp | Ontap Select Deploy Administration Utility | All versions |
| Netapp | Solidfire | All versions |
| Netapp | Steelstore Cloud Integrated Storage | All versions |
| Netapp | Hci Compute Node | All versions |
| Netapp | Hci Storage Node | All versions |
Weakness classification
References
- NVD record
- CVE.org record
- 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/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://security.gentoo.org/glsa/202105-35
- https://security.netapp.com/advisory/ntap-20200709-0004/
- https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html