#VU26756 Resource management error in libssh - CVE-2020-1730
Published: April 10, 2020
Vulnerability identifier: #VU26756
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-1730
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
libssh
libssh
Software vendor:
libssh
libssh
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper resource management while cleaning the AES-CTR ciphers when closing the connection. A remote attacker can initiate a connection to the client and server that supports AES-CTR ciphers and close the connection before ciphers are initialized, triggering a denial of service condition (service crash). The vulnerability affects both client and server implementations.
Remediation
Install updates from vendor's website.