Detections
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Amazon Linux 2023 : ruby3.2, ruby3.2-bundled-gems, ruby3.2-default-gems (ALAS2023-2025-929)
medium Nessus Plugin ID 234332
Synopsis
The remote Amazon Linux 2023 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-929 advisory.Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Starting in version 0.3.2 and prior to versions 0.3.8, 0.4.19, and 0.5.6, there is a possibility for denial of service by memory exhaustion in `net-imap`'s response parser. At any time while the client is connected, a malicious server can send can send highly compressed `uid-set` data which is automatically read by the client's receiver thread. The response parser uses `Range#to_a` to convert the `uid-set` data into arrays of integers, with no limitation on the expanded size of the ranges. Versions 0.3.8, 0.4.19, 0.5.6, and higher fix this issue. Additional details for proper configuration of fixed versions and backward compatibility are available in the GitHub Security Advisory. (CVE-2025-25186)
In the CGI gem before 0.4.2 for Ruby, the CGI::Cookie.parse method in the CGI library contains a potential Denial of Service (DoS) vulnerability. The method does not impose any limit on the length of the raw cookie value it processes. This oversight can lead to excessive resource consumption when parsing extremely large cookies. (CVE-2025-27219)
In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method. (CVE-2025-27220)
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 'dnf update ruby3.2 --releasever 2023.7.20250414' to update your system.See Also
https://alas.aws.amazon.com/AL2023/ALAS-2025-929.html
https://alas.aws.amazon.com/cve/html/CVE-2025-25186.html
https://alas.aws.amazon.com/cve/html/CVE-2025-27219.html
Plugin Details
Severity: Medium
ID: 234332
File Name: al2023_ALAS2023-2025-929.nasl
Version: 1.1
Type: local
Agent: unix
Published: 4/14/2025
Updated: 4/14/2025
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2025-27220
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 6.3
Threat Score: 1.7
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:ruby3.2-libs-debuginfo, p-cpe:/a:amazon:linux:ruby3.2-rubygem-power_assert, p-cpe:/a:amazon:linux:ruby3.2-bundled-gems, p-cpe:/a:amazon:linux:ruby3.2-rubygem-bigdecimal, p-cpe:/a:amazon:linux:ruby3.2-rubygem-psych, p-cpe:/a:amazon:linux:ruby3.2-rubygem-rdoc, p-cpe:/a:amazon:linux:ruby3.2-rubygem-psych-debuginfo, p-cpe:/a:amazon:linux:ruby3.2-rubygem-json, p-cpe:/a:amazon:linux:ruby3.2, p-cpe:/a:amazon:linux:ruby3.2-rubygem-io-console, p-cpe:/a:amazon:linux:ruby3.2-rubygem-bundler, p-cpe:/a:amazon:linux:ruby3.2-doc, p-cpe:/a:amazon:linux:ruby3.2-libs, p-cpe:/a:amazon:linux:ruby3.2-rubygem-irb, p-cpe:/a:amazon:linux:ruby3.2-rubygems, p-cpe:/a:amazon:linux:ruby3.2-default-gems, p-cpe:/a:amazon:linux:ruby3.2-rubygem-rexml, p-cpe:/a:amazon:linux:ruby3.2-rubygem-rake, p-cpe:/a:amazon:linux:ruby3.2-devel, p-cpe:/a:amazon:linux:ruby3.2-bundled-gems-debuginfo, p-cpe:/a:amazon:linux:ruby3.2-rubygem-rbs-debuginfo, p-cpe:/a:amazon:linux:ruby3.2-debugsource, p-cpe:/a:amazon:linux:ruby3.2-rubygem-json-debuginfo, p-cpe:/a:amazon:linux:ruby3.2-rubygem-bigdecimal-debuginfo, p-cpe:/a:amazon:linux:ruby3.2-rubygem-minitest, p-cpe:/a:amazon:linux:ruby3.2-rubygem-typeprof, p-cpe:/a:amazon:linux:ruby3.2-rubygem-rbs, p-cpe:/a:amazon:linux:ruby3.2-rubygem-test-unit, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:ruby3.2-rubygem-io-console-debuginfo, p-cpe:/a:amazon:linux:ruby3.2-rubygems-devel, p-cpe:/a:amazon:linux:ruby3.2-rubygem-rss, p-cpe:/a:amazon:linux:ruby3.2-debuginfo
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 4/9/2025
Vulnerability Publication Date: 2/10/2025