Allocation of Resources Without Limits or Throttling in libssh - CVE-2023-3603

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Main Vulnerability Database Vulnerabilities #VU83243

Allocation of Resources Without Limits or Throttling in libssh - CVE-2023-3603

Published: November 17, 2023


Vulnerability identifier: #VU83243
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-3603
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
libssh
Software vendor:
libssh

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to missing allocation check in sftp server processing read requests. A remote user can request up to 4GB SFTP reads, causing allocation of up to 4GB buffers, which was not being checked for failure, and perform a denial of service attack.


Remediation

Install updates from vendor's website.

External links