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Vulnerability details: VCID-3esp-7ue2-bydm
Vulnerability ID VCID-3esp-7ue2-bydm
Aliases CVE-2020-1730
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-476 NULL Pointer Dereference
System Score Found at
cvssv3 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-1730.json
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00087 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
cvssv3.1 5.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2020-1730
cvssv3.1 5.3 https://nvd.nist.gov/vuln/detail/CVE-2020-1730
archlinux Medium https://security.archlinux.org/AVG-1130
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-1730.json
https://api.first.org/data/v1/epss?cve=CVE-2020-1730
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1730
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-1730
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2A7BIFKUYIYKTY7FX4BEWVC2OHS5DPOU/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLSWHBQ3EPKGTGLQNH554Z746BJ3C554/
https://security.netapp.com/advisory/ntap-20200424-0001/
https://www.libssh.org/security/advisories/CVE-2020-1730.txt
https://www.oracle.com/security-alerts/cpuoct2020.html
1801998 https://bugzilla.redhat.com/show_bug.cgi?id=1801998
956308 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=956308
ASA-202004-11 https://security.archlinux.org/ASA-202004-11
AVG-1130 https://security.archlinux.org/AVG-1130
cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
cpe:2.3:a:oracle:mysql_workbench:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:mysql_workbench:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
CVE-2020-1730 https://nvd.nist.gov/vuln/detail/CVE-2020-1730
RHSA-2020:4545 https://access.redhat.com/errata/RHSA-2020:4545
RHSA-2020:5218 https://access.redhat.com/errata/RHSA-2020:5218
USN-4327-1 https://usn.ubuntu.com/4327-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-1730.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2020-1730
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://nvd.nist.gov/vuln/detail/CVE-2020-1730
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.26016
EPSS Score 0.00087
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:29:36.320596+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.11/main.json 37.0.0