#VU84723 Input validation error in ncurses - CVE-2023-50495

Vulnerability identifier: #VU84723

Vulnerability risk: Medium

CVSSv4.0: 6.6 [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-2023-50495

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ncurses
Universal components / Libraries / Libraries used by multiple products

Vendor: Free Software Foundation

Description

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

The vulnerability exists due to insufficient validation of user-supplied input within the _nc_wrap_entry() function. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

ncurses: 6.0 - 6.4

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External links
http://lists.gnu.org/archive/html/bug-ncurses/2023-04/msg00020.html
http://lists.gnu.org/archive/html/bug-ncurses/2023-04/msg00029.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.