CVE-2020-1730
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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 3.14% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 87.5% of scored records. A rank, not a probability.
- NVD base score
- 5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-04-13 00:00Z6 YR AGO
- Last updated
- 2024-08-04 06:46Z2 YR AGO
- Reserved
- 2019-11-27
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.3)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weaknesses
- CWE-476NULL Pointer DereferenceBase
- Data version
- 5.1
- Document digest
- 94a29835e0e4eba685566bbdc5e6897131567b65368bceba5dcd6f7c7e72543b
05 Affected products
06 References
- lists.fedoraproject.orgFEDORA-2020-5a77f0d68fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLSWHBQ3EPKGTGLQNH554Z746BJ3C554/
- usn.ubuntu.comUSN-4327-1https://usn.ubuntu.com/4327-1/
- lists.fedoraproject.orgFEDORA-2020-6cad41abb0https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2A7BIFKUYIYKTY7FX4BEWVC2OHS5DPOU/
- www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2020.html
- www.libssh.orghttps://www.libssh.org/security/advisories/CVE-2020-1730.txt
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1730
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20200424-0001/
07 Fixed in
Arch Linux
- libssh Fixed in 0.9.4-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
Debian 12
- libssh Fixed in 0.9.4-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libssh Fixed in 0.9.4-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libssh Fixed in 0.9.4-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- libssh Fixed in 0.8.0~20170825.94fa1e38-1ubuntu0.6
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.