CVE-2020-1730
libssh: denial of service when handling AES-CTR (or DES) ciphers
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
Se detectó un fallo en libssh versiones anteriores a 0.8.9 y versiones anteriores a 0.9.4, en la manera en que se manejaron los cifrados AES-CTR (o DES si está habilitado). El servidor o el cliente podrían bloquearse cuando la conexión no ha sido inicializada completamente y el sistema intenta limpiar los cifrados cuando se cierra la conexión. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema.
A flaw was found in the way libssh 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.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2019-11-27 CVE Reserved
- 2020-04-09 CVE Published
- 2024-08-04 CVE Updated
- 2024-08-07 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-476: NULL Pointer Dereference
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1730 | Issue Tracking | |
| https://security.netapp.com/advisory/ntap-20200424-0001 | Third Party Advisory |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://www.oracle.com/security-alerts/cpuoct2020.html | 2023-11-07 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Libssh Search vendor "Libssh" | Libssh Search vendor "Libssh" for product "Libssh" | >= 0.8.0 < 0.8.9 Search vendor "Libssh" for product "Libssh" and version " >= 0.8.0 < 0.8.9" | - |
Affected
| ||||||
| Libssh Search vendor "Libssh" | Libssh Search vendor "Libssh" for product "Libssh" | >= 0.9.0 < 0.9.4 Search vendor "Libssh" for product "Libssh" and version " >= 0.9.0 < 0.9.4" | - |
Affected
| ||||||
| Netapp Search vendor "Netapp" | Cloud Backup Search vendor "Netapp" for product "Cloud Backup" | - | - |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04" | lts |
Affected
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 19.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.10" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 31 Search vendor "Fedoraproject" for product "Fedora" and version "31" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 32 Search vendor "Fedoraproject" for product "Fedora" and version "32" | - |
Affected
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Affected
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| Oracle Search vendor "Oracle" | Mysql Workbench Search vendor "Oracle" for product "Mysql Workbench" | <= 8.0.21 Search vendor "Oracle" for product "Mysql Workbench" and version " <= 8.0.21" | - |
Affected
| ||||||