Flaw in libssh AES-CTR Ciphers Affects System Availability
CVE-2020-1730

5.3MEDIUM

Key Information:

Vendor

Red Hat
Status
Libssh
Vendor
CVE Published:
13 April 2020

What is CVE-2020-1730?

A flaw exists in libssh where AES-CTR or DES ciphers mishandling can lead to a server or client crash if a connection isn't fully initialized. This occurs during the cipher cleanup process upon connection closure. This vulnerability primarily threatens system availability, which could disrupt services relying on stable connectivity.

Affected Version(s)

libssh libssh versions before 0.8.9

libssh libssh versions before 0.9.4

References

https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisory
https://usn.ubuntu.com/4327-1/
vendor-advisory
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisory

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.