#VU76233 Use-after-free in cURL - CVE-2023-28319
Published: May 17, 2023
Vulnerability identifier: #VU76233
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-28319
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
cURL
cURL
Software vendor:
curl.haxx.se
curl.haxx.se
Description
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to a use-after-free error when checking the SSH sha256 fingerprint. A remote attacker can use the application to connect to a malicious SSH server, trigger a use-after-free error and gain access to potentially sensitive information.
Successful exploitation of the vulnerability requires usage of the the CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256 option, and also CURLOPT_VERBOSE or CURLOPT_ERRORBUFFER options have to be set.
Remediation
Install updates from vendor's website.