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Amazon Linux 2 : screen (ALAS-2025-2878)

medium Nessus Plugin ID 238364

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of screen installed on the remote host is prior to 4.1.0-0.27.20120314git3c2946. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2025-2878 advisory.

 TTY Hijacking while Attaching to a Multiuser Session in the screen package

 Has potential to break some reattach use cases, but the specific use case was broken already before.screen in Debian not installed setuid or setgidDEBIANBUG: [1105191]

 Info: https://www.openwall.com/lists/oss-security/2025/05/12/1Patch:
 https://git.savannah.gnu.org/cgit/screen.git/commit/?id=049b26b22e197ba3be9c46e5c193032e01a4724a (CVE-2025-46802)

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

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

Solution

Run 'yum update screen' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2025-2878.html

https://alas.aws.amazon.com/cve/html/CVE-2025-46802.html

https://alas.aws.amazon.com/faqs.html

Plugin Details

Severity: Medium

ID: 238364

File Name: al2_ALAS-2025-2878.nasl

Version: 1.1

Type: local

Agent: unix

Published: 6/12/2025

Updated: 6/12/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

Vector: CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:N

CVSS Score Source: CVE-2025-46802

CVSS v3

Risk Factor: Medium

Base Score: 6

Temporal Score: 5.2

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

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

CVSS v4

Risk Factor: Medium

Base Score: 5.3

Threat Score: 1.7

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:screen-debuginfo, p-cpe:/a:amazon:linux:screen

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 6/12/2025

Vulnerability Publication Date: 5/21/2025

Reference Information

CVE: CVE-2025-46802