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Vulnerability details: VCID-2pv1-wp6g-aaam
Vulnerability ID VCID-2pv1-wp6g-aaam
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 7.0
Risk 3.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-476 NULL Pointer Dereference
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2020/CVE-2020-1730.html
rhas Moderate https://access.redhat.com/errata/RHSA-2020:4545
rhas Moderate https://access.redhat.com/errata/RHSA-2020:5218
cvssv3 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-1730.json
epss 0.00076 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
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epss 0.0008 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00318 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00413 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
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epss 0.00413 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
epss 0.00413 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
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epss 0.00413 https://api.first.org/data/v1/epss?cve=CVE-2020-1730
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1801998
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=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 5.3 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
generic_textual Medium https://ubuntu.com/security/notices/USN-4327-1
generic_textual Medium https://usn.ubuntu.com/usn/usn-4327-1
generic_textual Medium https://www.libssh.org/security/advisories/CVE-2020-1730.txt
cvssv3.1 9.8 https://www.oracle.com/security-alerts/cpuoct2020.html
generic_textual CRITICAL https://www.oracle.com/security-alerts/cpuoct2020.html
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2020/CVE-2020-1730.html
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://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.netapp.com/advisory/ntap-20200424-0001/
https://ubuntu.com/security/notices/USN-4327-1
https://usn.ubuntu.com/4327-1/
https://usn.ubuntu.com/usn/usn-4327-1
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
GLSA-202004-08 https://security.gentoo.org/glsa/202004-08
RHSA-2020:4545 https://access.redhat.com/errata/RHSA-2020:4545
RHSA-2020:5218 https://access.redhat.com/errata/RHSA-2020:5218
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
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
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://www.oracle.com/security-alerts/cpuoct2020.html
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 0.19924
EPSS Score 0.00076
Published At March 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.