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Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.04 : ncurses vulnerabilities (USN-6099-1)

critical Nessus Plugin ID 176244

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6099-1 advisory.

 It was discovered that ncurses was incorrectly performing bounds checks when processing invalid hashcodes.
 An attacker could possibly use this issue to cause a denial of service or to expose sensitive information.
 This issue only affected Ubuntu 18.04 LTS. (CVE-2019-17594)

 It was discovered that ncurses was incorrectly handling end-of-string characters when processing terminfo and termcap files. An attacker could possibly use this issue to cause a denial of service or to expose sensitive information. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-17595)

 It was discovered that ncurses was incorrectly handling end-of-string characters when converting between termcap and terminfo formats. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-39537)

 It was discovered that ncurses was incorrectly performing bounds checks when dealing with corrupt terminfo data while reading a terminfo file. An attacker could possibly use this issue to cause a denial of service or to expose sensitive information. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2022-29458)

 It was discovered that ncurses was parsing environment variables when running with setuid applications and not properly handling the processing of malformed data when doing so. A local attacker could possibly use this issue to cause a denial of service (application crash) or execute arbitrary code. (CVE-2023-29491)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-6099-1

Plugin Details

Severity: Critical

ID: 176244

File Name: ubuntu_USN-6099-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 5/23/2023

Updated: 9/19/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2021-39537

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.9

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2023-29491

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:lib32ncurses5, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libx32tinfo5, p-cpe:/a:canonical:ubuntu_linux:lib64ncursesw6, p-cpe:/a:canonical:ubuntu_linux:libtinfo-dev, p-cpe:/a:canonical:ubuntu_linux:ncurses-examples, p-cpe:/a:canonical:ubuntu_linux:libncurses5-dev, p-cpe:/a:canonical:ubuntu_linux:libncursesw5, p-cpe:/a:canonical:ubuntu_linux:libncurses6, cpe:/o:canonical:ubuntu_linux:16.04:-:esm, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libx32tinfo-dev, p-cpe:/a:canonical:ubuntu_linux:libtinfo6, p-cpe:/a:canonical:ubuntu_linux:ncurses-bin, p-cpe:/a:canonical:ubuntu_linux:lib32ncursesw5-dev, p-cpe:/a:canonical:ubuntu_linux:lib32ncursesw6, p-cpe:/a:canonical:ubuntu_linux:lib32ncurses6, p-cpe:/a:canonical:ubuntu_linux:ncurses-base, p-cpe:/a:canonical:ubuntu_linux:libx32ncurses5-dev, p-cpe:/a:canonical:ubuntu_linux:libx32ncurses5, p-cpe:/a:canonical:ubuntu_linux:libx32ncursesw5, p-cpe:/a:canonical:ubuntu_linux:libncurses-dev, p-cpe:/a:canonical:ubuntu_linux:lib64ncurses-dev, p-cpe:/a:canonical:ubuntu_linux:lib32ncurses-dev, p-cpe:/a:canonical:ubuntu_linux:lib32ncurses5-dev, p-cpe:/a:canonical:ubuntu_linux:libncurses5, p-cpe:/a:canonical:ubuntu_linux:lib32tinfo-dev, p-cpe:/a:canonical:ubuntu_linux:libtinfo5, p-cpe:/a:canonical:ubuntu_linux:lib64tinfo6, p-cpe:/a:canonical:ubuntu_linux:libncursesw5-dev, p-cpe:/a:canonical:ubuntu_linux:libncursesw6, p-cpe:/a:canonical:ubuntu_linux:lib32tinfo6, p-cpe:/a:canonical:ubuntu_linux:lib32ncursesw5, p-cpe:/a:canonical:ubuntu_linux:ncurses-term, p-cpe:/a:canonical:ubuntu_linux:lib64ncurses5, cpe:/o:canonical:ubuntu_linux:23.04, p-cpe:/a:canonical:ubuntu_linux:libx32ncursesw5-dev, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:lib64tinfo5, p-cpe:/a:canonical:ubuntu_linux:lib32tinfo5, p-cpe:/a:canonical:ubuntu_linux:lib64ncurses5-dev, p-cpe:/a:canonical:ubuntu_linux:lib64ncurses6

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/23/2023

Vulnerability Publication Date: 10/14/2019

Reference Information

CVE: CVE-2019-17594, CVE-2019-17595, CVE-2021-39537, CVE-2022-29458, CVE-2023-29491

USN: 6099-1