[Bug 2048092] [NEW] [low-priority SRU] Fix CVE-2022-0563 in source

[dann frazier]

Public bug reported:

[Impact]
We did not fix this CVE in Ubuntu because we do not build the impacted binaries (we use --disable-chfn-chsh). However, some users are known to build their own binaries from this Ubuntu source and therefore could be impacted.

[Test Plan]
Since there is no impact to Ubuntu binaries, there is no functional change to verify. Regression testing using the existing build-time tests and autopkgtests should suffice.

We should also verify that util-linux source builds fine w/ chfn and
chsh enabled after applying this patch - otherwise it is really helping
no one.

[Where problems could occur]
The upstream patch is clearly restricted to the chfn chsh binaries, which are not compiled by Ubuntu, so I don't see a risk there. I do see a risk that this is used as a precedent to fix other no-impact-to-Ubuntu security issues in other source - say, just to silence 3rd party security scanners. I do not intend to set such a precedent here, and suggest we consider them only on a case-by-case basis.

** Affects: util-linux (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: util-linux (Ubuntu Jammy)
     Importance: Undecided
     Assignee: dann frazier (dannf)
         Status: In Progress


** Tags: block-proposed-jammy

** Also affects: util-linux (Ubuntu Jammy)
   Importance: Undecided
       Status: New

** Changed in: util-linux (Ubuntu)
       Status: New => Fix Released

** Tags added: block-proposed-jammy

** Changed in: util-linux (Ubuntu Jammy)
       Status: New => In Progress

** Changed in: util-linux (Ubuntu Jammy)
     Assignee: (unassigned) => dann frazier (dannf)

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https://bugs.launchpad.net/bugs/2048092

Title:
  [low-priority SRU] Fix CVE-2022-0563 in source

Status in util-linux package in Ubuntu:
  Fix Released
Status in util-linux source package in Jammy:
  In Progress

Bug description:
  [Impact]
  We did not fix this CVE in Ubuntu because we do not build the impacted binaries (we use --disable-chfn-chsh). However, some users are known to build their own binaries from this Ubuntu source and therefore could be impacted.

  [Test Plan]
  Since there is no impact to Ubuntu binaries, there is no functional change to verify. Regression testing using the existing build-time tests and autopkgtests should suffice.

  We should also verify that util-linux source builds fine w/ chfn and
  chsh enabled after applying this patch - otherwise it is really
  helping no one.

  [Where problems could occur]
  The upstream patch is clearly restricted to the chfn chsh binaries, which are not compiled by Ubuntu, so I don't see a risk there. I do see a risk that this is used as a precedent to fix other no-impact-to-Ubuntu security issues in other source - say, just to silence 3rd party security scanners. I do not intend to set such a precedent here, and suggest we consider them only on a case-by-case basis.

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