chore(deps): update dnspython requirement from ~=2.5.0 to ~=2.6.1 in /api

[dependabot]

Updates the requirements on dnspython to permit the latest version.

Release notes

Sourced from dnspython's releases.

dnspython 2.6.1

See What's New for details.

This is a bug fix release for 2.6.0 where the "TuDoor" fix erroneously suppressed legitimate Truncated exceptions. This caused the stub resolver to timeout instead of failing over to TCP when a legitimate truncated response was received over UDP.

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.

Changelog

Sourced from dnspython's changelog.

2.6.1

• The Tudoor fix ate legitimate Truncated exceptions, preventing the resolver from failing over to TCP and causing the query to timeout #1053.

2.6.0

• 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.

2.5.0

• Dnspython now uses hatchling for builds.

• Asynchronous destinationless sockets now work on Windows.

• Cython is no longer supported due to various typing issues.

• Dnspython now explicitly canonicalizes IPv4 and IPv6 addresses. Previously it was possible for non-canonical IPv6 forms to be stored in a AAAA address, which would work correctly but possibly cause problmes if the address were used as a key in a dictionary.

• The number of messages in a section can be retrieved with section_count().

• Truncation preferences for messages can be specified.

• The length of a message can be automatically prepended when rendering.

... (truncated)

Commits

• 0a742b9 update CI
• 0ea5ad0 The Tudoor fix should not eat valid Truncated exceptions #1053 (#1054)
• f12d398 2.6.1 version prep
• cecb853 Further improve CVE fix coverage to 100% for sync and async.
• 7952e31 test IgnoreErrors
• e093299 For the Tudoor fix, we also need the UDP nameserver to ignore_unexpected.
• 3af9f78 2.6.0 versioning
• ca63d95 Require cryptography >=41 instead of 42.
• 902cbf3 Create CODE_OF_CONDUCT.md
• ed9795f github contributing and pull request template
• Additional commits viewable in compare view

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 @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore <dependency name> major version will close this group update PR and stop Dependabot creating any more for the specific dependency's major version (unless you unignore this specific dependency's major version or upgrade to it yourself)
• @dependabot ignore <dependency name> minor version will close this group update PR and stop Dependabot creating any more for the specific dependency's minor version (unless you unignore this specific dependency's minor version or upgrade to it yourself)
• @dependabot ignore <dependency name> will close this group update PR and stop Dependabot creating any more for the specific dependency (unless you unignore this specific dependency or upgrade to it yourself)
• @dependabot unignore <dependency name> will remove all of the ignore conditions of the specified dependency
• @dependabot unignore <dependency name> <ignore condition> will remove the ignore condition of the specified dependency and ignore conditions

[dependabot]

Looks like dnspython is up-to-date now, so this is no longer needed.