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Description of problem:
Local authentication does not work with Amanda disk-based tape changer; using amrecover with "-o auth=local" fails to restore files.
Version-Release number of selected component (if applicable):
amanda-3.3.3-17.el7.x86_64
How reproducible:
Always
Steps to Reproduce:
1.
Configure Amanda to use a disk-based tape changer; e.g.:
define changer mychanger {
tapedev "chg-disk:/path/to/dumps"
}
tapedev "mychanger"
2.
Run
amrecover DailySet1 -o auth=local
and attempt to extract a file from the chg-disk device.
3.
Actual results:
amrecover reports:
Got no header and data from server, check in amidxtaped.*.debug and amandad.*.debug files on server
and the amidxtaped.*.debug file under /var/log/amanda/server/DailySet1 reports:
amidxtaped: Insecure dependency in unlink while running setgid at /usr/lib64/perl5/vendor_perl/Amanda/Changer/disk.pm line 477.
Expected results:
The files should be successfully extracted.
Additional info:
Line 259 of ./amanda-3.3.3/common-src/local-security.c from amanda-3.3.3.tar.gz in the source RPM reads:
setregid(uid, gid);
Clearly, this should instead be
setregid(gid, gid);
Because the amandabackup user has uid=33 and gid=6(disk), amandad sets its credentials with gid=33 and egid=6; this triggers the Perl security check when amandad invokes amidxtaped.
I cannot test this--I am not a Red Hat employee, and brewweb.engineering.redhat.com appears to be an internal site--it has no public IP address.
Does the scratch-build contain the source code fix I described?
(In reply to Dan Astoorian from comment #3)
> I cannot test this--I am not a Red Hat employee, and
> brewweb.engineering.redhat.com appears to be an internal site--it has no
> public IP address.
>
> Does the scratch-build contain the source code fix I described?
Yes, this build contains patch from attachment (see comment #4).
This issue is even in upstream version (upstream contacted already).
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2018:3216
Description of problem: Local authentication does not work with Amanda disk-based tape changer; using amrecover with "-o auth=local" fails to restore files. Version-Release number of selected component (if applicable): amanda-3.3.3-17.el7.x86_64 How reproducible: Always Steps to Reproduce: 1. Configure Amanda to use a disk-based tape changer; e.g.: define changer mychanger { tapedev "chg-disk:/path/to/dumps" } tapedev "mychanger" 2. Run amrecover DailySet1 -o auth=local and attempt to extract a file from the chg-disk device. 3. Actual results: amrecover reports: Got no header and data from server, check in amidxtaped.*.debug and amandad.*.debug files on server and the amidxtaped.*.debug file under /var/log/amanda/server/DailySet1 reports: amidxtaped: Insecure dependency in unlink while running setgid at /usr/lib64/perl5/vendor_perl/Amanda/Changer/disk.pm line 477. Expected results: The files should be successfully extracted. Additional info: Line 259 of ./amanda-3.3.3/common-src/local-security.c from amanda-3.3.3.tar.gz in the source RPM reads: setregid(uid, gid); Clearly, this should instead be setregid(gid, gid); Because the amandabackup user has uid=33 and gid=6(disk), amandad sets its credentials with gid=33 and egid=6; this triggers the Perl security check when amandad invokes amidxtaped.