MEDIUM
CVE-2020-1730
CWE-476Published: April 13, 2020· Updated: Jun 17, 2026
5.3
CVSS v3.1
Official 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.
Technical Analysis
CVE-2020-1730 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
ADVISORYhttps://usn.ubuntu.com/4327-1/
ADVISORYhttps://usn.ubuntu.com/4327-1/
All References (14)
→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1730Issue Tracking · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20200424-0001/Third Party Advisory
→
https://usn.ubuntu.com/4327-1/Third Party Advisory
→
https://www.libssh.org/security/advisories/CVE-2020-1730.txtVendor Advisory
→
https://www.oracle.com/security-alerts/cpuoct2020.htmlPatch · Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1730Issue Tracking · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20200424-0001/Third Party Advisory
→
https://usn.ubuntu.com/4327-1/Third Party Advisory
→
https://www.libssh.org/security/advisories/CVE-2020-1730.txtVendor Advisory
→
https://www.oracle.com/security-alerts/cpuoct2020.htmlPatch · Third Party Advisory
Quick Facts
CVE IDCVE-2020-1730
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-476
CISA KEVNo
Affected6 vendor(s)
PublishedApr 13, 2020
Related CVEs (CWE-476)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-1730 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.