TLS handshake is fatal, not transient - hence not retried

Bug #1928100 reported by Julian Andres Klode
This bug affects 1 person
Affects Status Importance Assigned to Milestone
apt (Ubuntu)

Bug Description

TLS handshakes are reported as fatal errors rather than transient errors like other connection errors on unencrypted connections. This seems wrong - a server may just be spinning up or down and fail during the handshake, and prevents retrying such downloads

[Test plan]

A test case has been added to the integration test suite that ensures handshake errors are retried upon configuration.

[Where problems could occur]
Transient errors do not cause an error exit from apt update, so scripts relying on errors from TLS handshakes in such situations will fail.

Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package apt - 2.3.4

apt (2.3.4) experimental; urgency=medium

  [ Khem Raj ]
  * srvrec: Keep support for older resolver

  [ Julian Andres Klode ]
  * Turn TLS handshake issues into transient errors (LP: #1928100)

 -- Julian Andres Klode <email address hidden> Wed, 12 May 2021 18:04:33 +0200

Changed in apt (Ubuntu):
status: New → Fix Released
Revision history for this message
Brian Murray (brian-murray) wrote : Please test proposed package

Hello Julian, or anyone else affected,

Accepted apt into hirsute-proposed. The package will build now and be available at in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-hirsute to verification-done-hirsute. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-hirsute. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Changed in apt (Ubuntu Hirsute):
status: New → Fix Committed
tags: added: verification-needed verification-needed-hirsute
Revision history for this message
Ubuntu SRU Bot (ubuntu-sru-bot) wrote : Autopkgtest regression report (apt/2.2.4ubuntu0.1)

All autopkgtests for the newly accepted apt (2.2.4ubuntu0.1) for hirsute have finished running.
The following regressions have been reported in tests triggered by the package:

ubuntu-advantage-tools/unknown (amd64, ppc64el, s390x, armhf)
reprotest/0.7.16 (arm64)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].


Thank you!

Revision history for this message
Julian Andres Klode (juliank) wrote :

autopkgtest have passed, so verified

tags: added: verification-done verification-done-hirsute
removed: verification-needed verification-needed-hirsute
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package apt - 2.2.4ubuntu0.1

apt (2.2.4ubuntu0.1) hirsute; urgency=medium

  * Merge 2.2.4 from Debian unstable
  * Extend the JSON hook fixes with support for version 0.2 (LP: #1926150)
    - json: Add origins fields to version
    - upgrade: Add JSON hook support (AptCli::Hooks::Upgrade)
    - json: Add `package-list` and `statistics` install hooks
    - json: Hook protocol 0.2 (added upgrade,downgrade,reinstall modes)

apt (2.2.4) unstable; urgency=medium

  [ Julian Andres Klode ]
  * Various bugfixes to the JSON hooks:
    - encoder fixes:
      + json: Escape strings using \u escape sequences, add test
      + json: Actually pop states
      + json: Encode NULL strings as null
    - json: Flush standard file descriptors before calling hooks
      (this avoids output from hooks in middle of apt output)
    - Non-installed JSON changes:
      + test/json: Make the test hook more reliable
      + Fix a typo in (thanks to Brian Murray)
  * Avoid infinite loop on EOF on media change prompt (LP: #1928687)
  * Turn TLS handshake issues into transient errors (LP: #1928100),
    this makes behavior consistent with TCP and enables Acquire::Retries
  * policy: Apply phasing to uninstalled packages too (LP: #1925745),
    this prevents inconsistencies when installing new binaries that depend
    on the same version of an already installed binary.

  [ David Kalnischkies ]
  * URI encode Filename field of Packages files (again). This fixes a
    regression introduced in 2.1.15 that causes download failures of
    packages with an epoch included in their filename (LP: #1931874).

 -- Julian Andres Klode <email address hidden> Mon, 14 Jun 2021 16:27:40 +0200

Changed in apt (Ubuntu Hirsute):
status: Fix Committed → Fix Released
Revision history for this message
Łukasz Zemczak (sil2100) wrote : Update Released

The verification of the Stable Release Update for apt has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

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