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


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
0.04% (16th percentile)

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  • Snyk IDSNYK-PYTHON-DNSPYTHON-6241713
  • published11 Feb 2024
  • disclosed9 Feb 2024
  • creditrthalley

Introduced: 9 Feb 2024

CVE-2023-29483  (opens in a new tab)
CWE-696  (opens 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.

CVSS Scores

version 3.1