[Bug 3265] New: Canonicalized hostnames do not clear previously-set variables after reloading config.
bugzilla-daemon at mindrot.org
bugzilla-daemon at mindrot.org
Thu Feb 25 13:54:17 AEDT 2021
https://bugzilla.mindrot.org/show_bug.cgi?id=3265
Bug ID: 3265
Summary: Canonicalized hostnames do not clear previously-set
variables after reloading config.
Product: Portable OpenSSH
Version: 8.4p1
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P5
Component: ssh
Assignee: unassigned-bugs at mindrot.org
Reporter: erica at ericas.site
Overview:
- When using CanonicalizeHostname, any configuration variables read
before the hostname canonicalization will be persisted after the
configuration is reloaded.
Steps to reproduce:
1) Create a ~/.ssh/config file containing the following:
CanonicalDomains bar.baz
CanonicalizeHostname yes
Host foo.bar.baz
User alice
Host *
User bob
2) Attempt to connect to "foo" (ssh foo)
Expected result:
- Connection attempt to foo.bar.baz with username alice
Actual result:
- Connection attempt to foo.bar.baz with username bob
Build date & hardware:
- OpenSSH_8.4p1, OpenSSL 1.1.1h 22 Sep 2020 on Linux 5.9.11 x86_64
Additional builds and platforms:
- OpenSSH_for_Windows_7.7p1, LibreSSL 2.6.5 on Windows 10 20H2
19042.804
Additional information:
- This is most likely caused by the user variable not being cleared
after the configuration is reloaded due to CanonicalizeHostname. Since
User is set to "bob" in the first pass due to matching Host * when the
hostname has not yet been resolved into a FQDN, User is not set to
"alice" during the second pass when the FQDN matches the Host block.
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