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Echo: dnspython, eventlet: security update to 0.35.2

high Tenable Cloud Security Plugin ID 455220

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - eventlet before 0.35.2, as used in dnspython before 2.6.0, allows remote attackers to interfere with DNS
 name resolution by quickly sending an invalid packet from the expected IP address and source port, aka a
 "TuDoor" attack. In other words, dnspython does not have the preferred behavior in which the DNS name
 resolution algorithm would proceed, within the full time window, in order to wait for a valid packet.
 NOTE: dnspython 2.6.0 is unusable for a different reason that was addressed in 2.6.1. (CVE-2023-29483)

Solution

Update the dnspython library and its related packages to version 0.35.2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2023-29483

Plugin Details

Severity: High

ID: 455220

Version: Revision 1.1

Type: Local

Published: 10/1/2026

Updated: 10/1/2026

Risk Information

VPR

Risk Factor: Low

Score: 3.9

Percentile: 52.7

CVSS v2

Risk Factor: Medium

Base Score: 6.6

Temporal Score: 5.2

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

CVSS Score Source: CVE-2023-29483

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.3

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/12/2026

Vulnerability Publication Date: 4/4/2024

Reference Information

CVE: CVE-2023-29483

IAVB: 2024-B-0029