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CVE-2020-1730

Date: April 12, 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.

Language: C

Severity Score

Related Resources (15)

https://nvd.nist.gov/vuln/detail/CVE-2020-1730
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2A7BIFKUYIYKTY7FX4BEWVC2OHS5DPOU/
https://security.netapp.com/advisory/ntap-20200424-0001/
https://www.oracle.com/security-alerts/cpuoct2020.html
https://usn.ubuntu.com/4327-1/
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-1730
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1730
https://security.alpinelinux.org/vuln/CVE-2020-1730
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2A7BIFKUYIYKTY7FX4BEWVC2OHS5DPOU/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VLSWHBQ3EPKGTGLQNH554Z746BJ3C554/
https://security-tracker.debian.org/tracker/CVE-2020-1730
https://www.libssh.org/security/advisories/CVE-2020-1730.txt
https://access.redhat.com/security/cve/CVE-2020-1730
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLSWHBQ3EPKGTGLQNH554Z746BJ3C554/
https://www.mend.io/vulnerability-database/CVE-2020-1730

Severity Score

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

Uncontrolled Resource Consumption

CWE-400

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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