openEuler 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

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

ncurses-base: before 6.2-5

ncurses-devel: before 6.2-5

ncurses-debugsource: before 6.2-5

ncurses-libs: before 6.2-5

ncurses-help: before 6.2-5

ncurses-debuginfo: before 6.2-5

ncurses: before 6.2-5

CPE2.3

• cpe:2.3:o:openeuler:openeuler:20.03:LTS SP1:*:*:*:*:*:
• cpe:2.3:o:openeuler:openeuler:20.03:LTS SP3:*:*:*:*:*:
• cpe:2.3:o:openeuler:openeuler:20.03:LTS SP4:*:*:*:*:*:
• cpe:2.3:o:openeuler:ncurses-base:*:*:*:*:*:openeuler:*:
• cpe:2.3:o:openeuler:ncurses-devel:*:*:*:*:*:openeuler:*:
• cpe:2.3:o:openeuler:ncurses-debugsource:*:*:*:*:*:openeuler:*:
• cpe:2.3:o:openeuler:ncurses-libs:*:*:*:*:*:openeuler:*:
• cpe:2.3:o:openeuler:ncurses-help:*:*:*:*:*:openeuler:*:
• cpe:2.3:o:openeuler:ncurses-debuginfo:*:*:*:*:*:openeuler:*:
• cpe:2.3:o:openeuler:ncurses:*:*:*:*:*:openeuler:*:

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1969

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.