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chore(deps): update dependency dnspython to v2.9.2 [security] - #1121
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This PR contains the following updates:
2.9.1→2.9.2dnspython has excessive memory and CPU use
CVE-2026-128089 / GHSA-vvf4-9x63-8xvv
More information
Details
Summary
A maliciously crafted zone file could use a WKS record to consume excessive memory and CPU, possibly causing the process to exit due to memory exhaustion.
Details
The
from_text()parser does not check that a WKS record service number is between 0 and 65535 inclusive. It then uses this number to resize the bitmap to accommodate a bit with that offset. This can cause extremely large memory allocations, and also extends the array very inefficiently, wasting CPU.Proof of concept
This demonstrates the failure to limit the service number, though with a value that does not cause excessive memory or CPU consumption.
Impact
If dnspython is used to read zonefile format where the attacker can control the type and rdata text, the program may consume excessive memory or CPU, denying service.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Release Notes
rthalley/dnspython (dnspython)
v2.9.2: dnspython 2.9.2Compare Source
A malicious WKS record in text format can consume excessive memory and CPU when parsed, possibly causing the process to exit due to memory exhaustion. Thanks to Jace (GitHub @manus-use) for discovering and reporting this issue.
See What's New for details.
The minimum supported version of Python is 3.11.
My thanks to the many people who have contributed to this release. Also thanks to my co-maintainers: Nicki Křížek, Petr Špaček, and Brian Wellington.
This release was published to PyPI using Trusted Publishing.
Configuration
📅 Schedule: (UTC)
🚦 Automerge: Enabled.
♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.
🔕 Ignore: Close this PR and you won't be reminded about this update again.
This PR was generated by Mend Renovate. View the repository job log.