CVE-2020-1730

Published: Apr 13, 2020Modified: Jun 17, 2026

5.3

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploitability: 3.9 / Impact: 1.4

Source: NVD

Description

A flaw was found in libssh versions before 0.8.9 and before 0.9.4 in the way it handled AES-CTR (or DES ciphers if enabled) ciphers. The server or client could crash when the connection hasn't been fully initialized and the system tries to cleanup the ciphers when closing the connection. The biggest threat from this vulnerability is system availability.

Affected (9)

Products: Libssh: Libssh · Canonical: Ubuntu Linux · Fedoraproject: Fedora · +3 more

Show all products

Libssh: Libssh · Canonical: Ubuntu Linux · Fedoraproject: Fedora · Netapp: Cloud Backup · Redhat: Enterprise Linux · Oracle: Mysql Workbench

1 product

1 product

1 product

1 product

1 product

Enterprise Linux

1 product

Mysql Workbench

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Libssh Libssh	From 0.8.0 to 0.8.9
Libssh Libssh	From 0.9.0 to 0.9.4

Configuration B

6 vulnerable

Vulnerable Software	Affected Versions
Canonical Ubuntu Linux	Version 18.04
Canonical Ubuntu Linux	Version 19.10
Fedoraproject Fedora	Version 31
Fedoraproject Fedora	Version 32
Netapp Cloud Backup	All versions
Redhat Enterprise Linux	Version 8.0

Configuration C

1 vulnerable

Vulnerable Software	Affected Versions
Oracle Mysql Workbench	Up to 8.0.21

Related CWEs

NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

References (14)

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1730

Source: secalert@redhat.com

Issue TrackingThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2A7BIFKUYIYKTY7FX4BEWVC2OHS5DPOU/

Source: secalert@redhat.com

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLSWHBQ3EPKGTGLQNH554Z746BJ3C554/

Source: secalert@redhat.com

https://security.netapp.com/advisory/ntap-20200424-0001/

Source: secalert@redhat.com

Third Party Advisory

https://usn.ubuntu.com/4327-1/

Source: secalert@redhat.com

Third Party Advisory

https://www.libssh.org/security/advisories/CVE-2020-1730.txt

Source: secalert@redhat.com

Vendor Advisory

https://www.oracle.com/security-alerts/cpuoct2020.html

Source: secalert@redhat.com

PatchThird Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1730

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2A7BIFKUYIYKTY7FX4BEWVC2OHS5DPOU/

Source: af854a3a-2127-422b-91ae-364da2661108

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLSWHBQ3EPKGTGLQNH554Z746BJ3C554/

Source: af854a3a-2127-422b-91ae-364da2661108

https://security.netapp.com/advisory/ntap-20200424-0001/

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://usn.ubuntu.com/4327-1/

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://www.libssh.org/security/advisories/CVE-2020-1730.txt

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://www.oracle.com/security-alerts/cpuoct2020.html

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

Timeline

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