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.
Published 2020-04-13 19:15:11
Updated 2022-11-08 20:09:30
Source Red Hat, Inc.
View at NVD,   CVE.org

Threat overview for CVE-2020-1730

Top countries where our scanners detected CVE-2020-1730
Top open port discovered on systems with this issue 80
IPs affected by CVE-2020-1730 58,324
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2020-1730!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2020-1730

0.42%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 74 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-1730

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
MEDIUM AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
NIST
5.3
MEDIUM CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.9
1.4
Red Hat, Inc.
5.3
MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.9
1.4
NIST

CWE ids for CVE-2020-1730

  • A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
    Assigned by:
    • nvd@nist.gov (Primary)
    • secalert@redhat.com (Secondary)

References for CVE-2020-1730

Products affected by CVE-2020-1730

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