#VU73777 Out-of-bounds read in OpenSSH
Published: March 17, 2023
Vulnerability identifier: #VU73777
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
OpenSSH
OpenSSH
Software vendor:
OpenSSH
OpenSSH
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition in the getrrsetbyname(3) function within the VerifyHostKeyDNS feature. A remote attacker can send a specifically crafted DNS response to the ssh client, trigger an out-of-bounds read of adjacent stack data of the ssh client and perform a denial of service (DoS) attack.
Remediation
Install updates from vendor's website.