Threadlinqs IntelligenceStart free

VulnerabilityCVE-2023-29483Published 2024-04-11

CVE-2023-29483 — Eventlet

highPublic exploit1 PoC repo

As of 2025-11-04, CVE-2023-29483 is a HIGH-severity vulnerability in Eventlet, CVSS v3.1 7, EPSS 1.8% (77.3th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2023-29483 as of 2025-11-04; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

CVSS v3.1
7/10High
EPSS
1.8%Higher than 77.3% of scored CVEs
CISA KEV
NoNot in the KEV catalog
Tracked threats
0None linked yet
Priority
8.6/10Threadlinqs triage score
Published
Updated 2025-11-04
CVSS v3.1 7 (HIGH) · EPSS 1.8% (higher than 77.3% of all scored CVEs) · Priority 8.6/10 · Published 2024-04-11

Last updated:

What is CVE-2023-29483?

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.

The record classifies CVE-2023-29483 under weakness class CWE-292. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on availability. 7 affected-product entries are recorded, across 4 vendors, listed below. The identifier was first published 907 days ago.

Severity and exploitation probability

CVSS v3.1 base score
7 — HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
EPSS (FIRST)
1.8% probability of exploitation in the next 30 days, higher than 77.3% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
8.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2024-04-11, last modified 2025-11-04

Is CVE-2023-29483 being exploited?

Weaponised exploit code for CVE-2023-29483 is publicly available. 1 public proof-of-concept repository is tracked for this identifier.

Affected products and versions

  • Eventlet: Eventlet
  • Dnspython: Dnspython
  • Fedoraproject: Fedora 38, Fedora 39, Fedora 40
  • Netapp: Bootstrap Os, Hci Compute Node

Affected software packages:

  • pip:eventlet — patched in 0.35.2
  • pip:dnspython — patched in 2.6.1

How to fix CVE-2023-29483

Fixed versions are recorded for 2 packages: pip:eventlet 0.35.2, pip:dnspython 2.6.1. No vendor patch reference has been recorded for CVE-2023-29483 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2023-29483

No threat campaign in the Threadlinqs corpus currently references CVE-2023-29483, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Vendor advisory and patch

Other references

Showing 8 of 10 recorded references.