vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2020-1730

MEDIUM
5.3
CVSS Score
Published: April 13, 2020 at 12:00 AM UTC
Updated: June 17, 2026 at 03:02 AM UTC
6 products affected across 6 vendorsFedoraUbuntu LinuxEnterprise Linux

Using libssh by Red Hat?

Get instant alerts when new vulnerabilities affect libssh - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM5.3
Exploit prediction
EPSS 3%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
18.0419.10
Fedora· Fedora Projectrpm
95%
3132
Libssh· Libssh
95%
v < 0.8.9v < 0.9.40.8.0 ≤ v < 0.8.90.9.0 ≤ v < 0.9.4
Affected range stops below 0.8.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.9.4, so it looks safe — our inference, not a vendor statement
Cloud Backup· NetAppdrupal
95%
All versions
MySQL Workbench· Oracle
95%
v ≤ 8.0.21
Enterprise Linux· Red Hatrpm
95%
8.0

References (7)

Issue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1730
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2A7BIFKUYIYKTY7FX4BEWVC2OHS5DPOU/
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLSWHBQ3EPKGTGLQNH554Z746BJ3C554/
Third Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20200424-0001/
Vendor AdvisoryThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/4327-1/
Vendor Advisory
Source: [email protected]
https://www.libssh.org/security/advisories/CVE-2020-1730.txt
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://www.oracle.com/security-alerts/cpuoct2020.html

CVSS

5.3MEDIUMredhat
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card