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CVE-2023-36811 upgrade docs: consider checkpoint archives, fixes #7802 

The traceback seen there came from borg not showing a .checkpoint archive
that didn't have a valid TAM and thus the user not see it / fix it:

https://github.com/borgbackup/borg/issues/7802#issuecomment-1793860606
This commit is contained in:
Thomas Waldmann 2023-11-06 14:34:15 +01:00
parent e431b838f4
commit 62114466e4
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@ -50,7 +50,7 @@ no matter what encryption mode they use, including "none"):
b) If you get "Manifest TAM not found and not required", run
``borg upgrade --tam --force <repository>`` *on every client*.
3. Run ``BORG_WORKAROUNDS=ignore_invalid_archive_tam borg list --format='{name} {time} tam:{tam}{NL}' <repo>``.
3. Run ``BORG_WORKAROUNDS=ignore_invalid_archive_tam borg list --consider-checkpoints --format='{name} {time} tam:{tam}{NL}' <repo>``.
"tam:verified" means that the archive has a valid TAM authentication.
"tam:none" is expected as output for archives created by borg <1.0.9.
"tam:none" is also expected for archives resulting from a borg rename
@ -66,7 +66,7 @@ no matter what encryption mode they use, including "none"):
Run ``BORG_WORKAROUNDS=ignore_invalid_archive_tam borg upgrade --archives-tam <repo>``.
This will unconditionally add a correct archive TAM to all archives not having one.
``borg check`` would consider TAM-less or invalid-TAM archives as garbage or a potential attack.
To see that all archives now are "tam:verified" run: ``borg list --format='{name} {time} tam:{tam}{NL}' <repo>``
To see that all archives now are "tam:verified" run: ``borg list --consider-checkpoints --format='{name} {time} tam:{tam}{NL}' <repo>``
5. Please note that you should never use BORG_WORKAROUNDS=ignore_invalid_archive_tam
for normal production operations - it is only needed once to get the archives in a