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.

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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

JSON
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