CVE-2020-1730

Published: 9 April 2020

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.

Priority

Cvss 3 Severity Score

5.3

Score breakdown

Status

Package	Release	Status
libssh Launchpad, Ubuntu, Debian	bionic	Released (0.8.0~20170825.94fa1e38-1ubuntu0.6)
	eoan	Released (0.9.0-1ubuntu1.4)
	trusty	Does not exist
	upstream	Released (0.8.9,0.9.4)
	xenial	Not vulnerable (code not present)

Severity score breakdown

Parameter	Value
Base score	5.3
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	Low
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

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