This release addresses the potential DoS issue discussed in the "TuDoor" paper (CVE-2023-29483). The dnspython stub resolver is vulnerable to a potential DoS if a bad-in-some-way response from the right address and port forged by an attacker arrives before a legitimate one on the UDP port dnspython is using for that query. In this situation, dnspython might switch to querying another resolver or give up entirely, possibly denying service for that resolution. This release addresses the issue by adopting the recommended mitigation, which is ignoring the bad packets and continuing to listen for a legitimate response until the timeout for the query has expired.
Thank you to all the contributors to this release, and, as usual, thanks to my co-maintainers: Tomáš Křížek, Petr Špaček, and Brian Wellington.
As mentioned in the "TuDoor" paper and the associated CVE-2023-29483, the dnspython
stub resolver is vulnerable to a potential DoS if a bad-in-some-way response from the
right address and port forged by an attacker arrives before a legitimate one on the
UDP port dnspython is using for that query.
This release addresses the issue by adopting the recommended mitigation, which is
ignoring the bad packets and continuing to listen for a legitimate response until
the timeout for the query has expired.
Added support for the NSID EDNS option.
Dnspython now looks for version metadata for optional packages and will not
use them if they are too old. This prevents possible exceptions when a
feature like DoH is not desired in dnspython, but an old httpx is installed
along with dnspython for some other purpose.
The DoHNameserver class now allows GET to be used instead of the default POST,
and also passes source and source_port correctly to the underlying query
methods.
Commits
cecb853 Further improve CVE fix coverage to 100% for sync and async.
urllib3 is raising ~$40,000 USD to release HTTP/2 support and ensure long-term sustainable maintenance of the project after a sharp decline in financial support for 2023. If your company or organization uses Python and would benefit from HTTP/2 support in Requests, pip, cloud SDKs, and thousands of other projects please consider contributing financially to ensure HTTP/2 support is developed sustainably and maintained for the long-haul.
Thank you for your support.
Changes
Fixed issue where InsecureRequestWarning was emitted for HTTPS connections when using Emscripten. (#3331)
Fixed HTTPConnectionPool.urlopen to stop automatically casting non-proxy headers to HTTPHeaderDict. This change was premature as it did not apply to proxy headers and HTTPHeaderDict does not handle byte header values correctly yet. (#3343)
Changed ProtocolError to InvalidChunkLength when response terminates before the chunk length is sent. (#2860)
Changed ProtocolError to be more verbose on incomplete reads with excess content. (#3261)
Fixed issue where InsecureRequestWarning was emitted for HTTPS connections when using Emscripten. ([#3331](https://github.com/urllib3/urllib3/issues/3331) <https://github.com/urllib3/urllib3/issues/3331>__)
Fixed HTTPConnectionPool.urlopen to stop automatically casting non-proxy headers to HTTPHeaderDict. This change was premature as it did not apply to proxy headers and HTTPHeaderDict does not handle byte header values correctly yet. ([#3343](https://github.com/urllib3/urllib3/issues/3343) <https://github.com/urllib3/urllib3/issues/3343>__)
Changed ProtocolError to InvalidChunkLength when response terminates before the chunk length is sent. ([#2860](https://github.com/urllib3/urllib3/issues/2860) <https://github.com/urllib3/urllib3/issues/2860>__)
Changed ProtocolError to be more verbose on incomplete reads with excess content. ([#3261](https://github.com/urllib3/urllib3/issues/3261) <https://github.com/urllib3/urllib3/issues/3261>__)
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Bumps the dependencies group in /.config with 3 updates: pipdeptree, dnspython and urllib3.
Updates
pipdeptree
from 2.13.2 to 2.14.0Release notes
Sourced from pipdeptree's releases.
Commits
134ca6e
Implement --license option (#318)312818a
[pre-commit.ci] pre-commit autoupdate (#317)9d8f2b7
[pre-commit.ci] pre-commit autoupdate (#316)1cd3453
[pre-commit.ci] pre-commit autoupdate (#315)75389a0
[pre-commit.ci] pre-commit autoupdate (#314)d317f9b
[pre-commit.ci] pre-commit autoupdate (#313)Updates
dnspython
from 2.5.0 to 2.6.0Release notes
Sourced from dnspython's releases.
Changelog
Sourced from dnspython's changelog.
Commits
cecb853
Further improve CVE fix coverage to 100% for sync and async.7952e31
test IgnoreErrorse093299
For the Tudoor fix, we also need the UDP nameserver to ignore_unexpected.3af9f78
2.6.0 versioningca63d95
Require cryptography >=41 instead of 42.902cbf3
Create CODE_OF_CONDUCT.mded9795f
github contributing and pull request template1a581c7
The DoHNameserver now supports using GET instead of POST742fddb
2.6.0 prep80b03f8
2.6.0 prepUpdates
urllib3
from 2.2.0 to 2.2.1Release notes
Sourced from urllib3's releases.
Changelog
Sourced from urllib3's changelog.
Commits
54d6edf
Release 2.2.149b2dda
Stop casting request headers to HTTPHeaderDict (#3344)e22f651
Fix docstring of retries parameterfa54179
Distinguish between truncated and excess content in response (#3273)cfe52f9
Fix InsecureRequestWarning for HTTPS Emscripten requests (#3333)25155d7
Ensure no remote connections during testing (#3328)12f9233
Bump cryptography to 42.0.2 and PyOpenSSL to 24.0.0 (#3340)9929d3c
Add nox session to start local Pyodide consoleaa8d3dd
Fix ssl_version tests for upcoming migration to pytest 823f2287
Remove TODO about informational responses (#3319)Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
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