Detections
Analytics
Amazon Linux 2023 : python3-twisted, python3-twisted+tls (ALAS2023-2026-3385)
high Nessus Plugin ID 377965
Synopsis
The remote Amazon Linux 2023 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3385 advisory.A flaw was found in Twisted. An unauthenticated remote attacker can cause a Denial of Service (DoS) by exhausting server memory. The issue occurs because the XML stream parser retains unfinished elements in memory without enforcing size or element count limits. By transmitting a continuous stream of child elements within an unclosed container during pre-authentication communication, an attacker can crash the server process. (CVE-2026-115775)
A flaw was found in Twisted. The Internet Relay Chat (IRC) protocol implementation does not enforce a maximum line length when buffering incoming connection data. An unauthenticated remote attacker can exploit this by sending a continuous stream of data without line feed characters to an IRC service. This causes the server process to consume excessive memory until it runs out of resources, resulting in a Denial of Service (DoS) that terminates connections for all users. (CVE-2026-115776)
A flaw was found in Twisted. The Telnet service implementation fails to enforce a size limit on incoming data buffers during protocol option negotiation, which occurs before user authentication. An unauthenticated remote attacker can exploit this vulnerability by sending a continuous stream of subnegotiation data without a terminating delimiter. This causes unbounded memory consumption that can crash the application, resulting in a Denial of Service (DoS). (CVE-2026-115778)
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 python-twisted --releasever 2023.12.20261109' or or 'dnf update --advisory ALAS2023-2026-3385 --releasever 2023.12.20261109' to update your system.See Also
https://alas.aws.amazon.com//AL2023/ALAS2023-2026-3385.html
https://alas.aws.amazon.com/faqs.html
https://explore.alas.aws.amazon.com/CVE-2026-115775.html
Plugin Details
Severity: High
ID: 377965
File Name: al2023_ALAS2023-2026-3385.nasl
Version: 1.1
Type: Local
Agent: unix
Published: 11/9/2026
Updated: 11/9/2026
Supported Sensors: Nessus Agent, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.73
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-2026-115778
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: High
Base Score: 8.7
Threat Score: 6.6
Threat Vector: CVSS:4.0/E:U
Vector: 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
CVSS Score Source: CVE-2026-115775
Vulnerability Information
CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:python3-twisted, p-cpe:/a:amazon:linux:python3-twisted%2btls
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 11/9/2026
Vulnerability Publication Date: 10/23/2026