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Amazon Linux 2 : redis, --advisory ALAS2REDIS6-2025-015 (ALASREDIS6-2025-015)

critical Nessus Plugin ID 270551

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Synopsis

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

Description

The version of redis installed on the remote host is prior to 6.2.20-2. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2REDIS6-2025-015 advisory.

 Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted Lua script to cause an integer overflow and potentially lead to remote code execution The problem exists in all versions of Redis with Lua scripting. This issue is fixed in version 8.2.2. (CVE-2025-46817)

 Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted Lua script to manipulate different LUA objects and potentially run their own code in the context of another user. The problem exists in all versions of Redis with LUA scripting. This issue is fixed in version 8.2.2. A workaround to mitigate the problem without patching the redis-server executable is to prevent users from executing LUA scripts. This can be done using ACL to block a script by restricting both the EVAL and FUNCTION command families. (CVE-2025-46818)

 Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted LUA script to read out-of-bound data or crash the server and subsequent denial of service. The problem exists in all versions of Redis with Lua scripting. This issue is fixed in version 8.2.2. To workaround this issue without patching the redis-server executable is to prevent users from executing Lua scripts. This can be done using ACL to block a script by restricting both the EVAL and FUNCTION command families. (CVE-2025-46819)

 Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted Lua script to manipulate the garbage collector, trigger a use-after-free and potentially lead to remote code execution. The problem exists in all versions of Redis with Lua scripting. This issue is fixed in version 8.2.2. To workaround this issue without patching the redis-server executable is to prevent users from executing Lua scripts. This can be done using ACL to restrict EVAL and EVALSHA commands. (CVE-2025-49844)

Tenable has extracted the preceding description block directly from the tested product 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

Run 'yum update redis' or or 'yum update --advisory ALAS2REDIS6-2025-015' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2REDIS6-2025-015.html

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

https://explore.alas.aws.amazon.com/CVE-2025-46817.html

https://explore.alas.aws.amazon.com/CVE-2025-46818.html

https://explore.alas.aws.amazon.com/CVE-2025-46819.html

https://explore.alas.aws.amazon.com/CVE-2025-49844.html

Plugin Details

Severity: Critical

ID: 270551

File Name: al2_ALASREDIS6-2025-015.nasl

Version: 1.1

Type: local

Agent: unix

Published: 10/15/2025

Updated: 10/15/2025

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

Risk Information

VPR

Risk Factor: Critical

Score: 10.0

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2025-46817

CVSS v3

Risk Factor: Critical

Base Score: 9.9

Temporal Score: 8.9

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

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

CVSS Score Source: CVE-2025-49844

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:redis, p-cpe:/a:amazon:linux:redis-debuginfo, p-cpe:/a:amazon:linux:redis-devel, p-cpe:/a:amazon:linux:redis-doc

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

Exploit Available: true

Exploit Ease: No known exploits are available

Patch Publication Date: 10/14/2025

Vulnerability Publication Date: 10/3/2025

Reference Information

CVE: CVE-2025-46817, CVE-2025-46818, CVE-2025-46819, CVE-2025-49844

IAVA: 2025-A-0731