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Incorrect Behavior Order Affecting dnspython package, versions [,2.6.1)

0.0
medium

Snyk CVSS

    Attack Complexity High
    Availability High

    Threat Intelligence

    Exploit Maturity Proof of concept
    EPSS 0.04% (10th percentile)
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Red Hat
5.9 medium

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  • Snyk ID SNYK-PYTHON-DNSPYTHON-6241713
  • published 11 Feb 2024
  • disclosed 9 Feb 2024
  • credit rthalley
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Introduced: 9 Feb 2024

CVE-2023-29483 Open this link in a new tab
CWE-696 Open this link in a new tab

How to fix?

Upgrade dnspython to version 2.6.1 or higher.

Overview

Affected versions of this package are vulnerable to Incorrect Behavior Order in the DNS pre-processing pipeline, which allows an off-path attacker who can spoof the source IP address of a malformed DNS response packet to cause denial of service. The UDP processing functions in query.py and asyncquery.py accept the first-arriving packet before closing the receiving socket, allowing the attacker to make the remote nameserver appear unavailable for the target resolver and clients.