Amazon Linux AMI update for ncurses



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-50495
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Amazon Linux AMI
Operating systems & Components / Operating system

ncurses
Operating systems & Components / Operating system package or component

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU84723

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 - 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 packages:

aarch64:
    ncurses-static-6.2-4.20200222.amzn2023.0.5.aarch64
    ncurses-compat-libs-debuginfo-6.2-4.20200222.amzn2023.0.5.aarch64
    ncurses-libs-debuginfo-6.2-4.20200222.amzn2023.0.5.aarch64
    ncurses-c++-libs-debuginfo-6.2-4.20200222.amzn2023.0.5.aarch64
    ncurses-debuginfo-6.2-4.20200222.amzn2023.0.5.aarch64
    ncurses-debugsource-6.2-4.20200222.amzn2023.0.5.aarch64
    ncurses-libs-6.2-4.20200222.amzn2023.0.5.aarch64
    ncurses-6.2-4.20200222.amzn2023.0.5.aarch64
    ncurses-c++-libs-6.2-4.20200222.amzn2023.0.5.aarch64
    ncurses-compat-libs-6.2-4.20200222.amzn2023.0.5.aarch64
    ncurses-devel-6.2-4.20200222.amzn2023.0.5.aarch64

noarch:
    ncurses-base-6.2-4.20200222.amzn2023.0.5.noarch
    ncurses-term-6.2-4.20200222.amzn2023.0.5.noarch

src:
    ncurses-6.2-4.20200222.amzn2023.0.5.src

x86_64:
    ncurses-static-6.2-4.20200222.amzn2023.0.5.x86_64
    ncurses-c++-libs-debuginfo-6.2-4.20200222.amzn2023.0.5.x86_64
    ncurses-compat-libs-6.2-4.20200222.amzn2023.0.5.x86_64
    ncurses-debuginfo-6.2-4.20200222.amzn2023.0.5.x86_64
    ncurses-compat-libs-debuginfo-6.2-4.20200222.amzn2023.0.5.x86_64
    ncurses-6.2-4.20200222.amzn2023.0.5.x86_64
    ncurses-libs-6.2-4.20200222.amzn2023.0.5.x86_64
    ncurses-libs-debuginfo-6.2-4.20200222.amzn2023.0.5.x86_64
    ncurses-c++-libs-6.2-4.20200222.amzn2023.0.5.x86_64
    ncurses-debugsource-6.2-4.20200222.amzn2023.0.5.x86_64
    ncurses-devel-6.2-4.20200222.amzn2023.0.5.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

ncurses: All versions

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2024-466.html


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.



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