Ubuntu update for ncurses

1) Input validation error

EUVDB-ID: #VU84723

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-50495

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

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

Update the affected package ncurses to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 18.04

libx32tinfo5 (Ubuntu package): before Ubuntu Pro

lib64ncurses5 (Ubuntu package): before Ubuntu Pro

lib64tinfo5 (Ubuntu package): before Ubuntu Pro

lib32ncurses5 (Ubuntu package): before Ubuntu Pro

lib32tinfo5 (Ubuntu package): before Ubuntu Pro

libx32ncurses5 (Ubuntu package): before Ubuntu Pro

libncurses5 (Ubuntu package): before Ubuntu Pro

libtinfo5 (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6684-1

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.