VulnerabilityModified
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.
MEDIUM 5.9EPSS 2.06%
Does this matter?
Lower severity and a low EPSS score (2.06%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 2.06% probability · 80th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-203
- Affected
- openbsd/openssh · netapp/aff a700s firmware · netapp/active iq unified manager · netapp/hci management node · netapp/ontap select deploy administration utility · netapp/solidfire · netapp/steelstore cloud integrated storage · netapp/hci compute node · netapp/hci storage node
- Source
- cve@mitre.org
References
- http://www.openwall.com/lists/oss-security/2020/12/02/1Mailing List, Patch, Third Party Advisory
- https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362dPatch, Third Party Advisory
- https://docs.ssh-mitm.at/CVE-2020-14145.htmlThird Party Advisory
- https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1Patch, Third Party Advisory
- https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.pyThird Party Advisory
- https://security.gentoo.org/glsa/202105-35Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200709-0004/Third Party Advisory
- https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/12/02/1Mailing List, Patch, Third Party Advisory
- https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362dPatch, Third Party Advisory
- https://docs.ssh-mitm.at/CVE-2020-14145.htmlThird Party Advisory
- https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1Patch, Third Party Advisory
- https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.pyThird Party Advisory
- https://security.gentoo.org/glsa/202105-35Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200709-0004/Third Party Advisory
- https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.