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ssh in OpenSSH before 10.1 allows control characters in usernames that
originate from certain possibly untrusted sources, potentially leading
to code execution when a ProxyCommand is used. The untrusted sources
are the command line and %-sequence expansion of a configuration file.
Note:
openssh does not support variable expansion until 10.0, so backport
adapts for this.
Reference:
https://nvd.nist.gov/vuln/detail/CVE-2025-61984
Upstream patch:
35d5917652
(From OE-Core rev: 717d4c7609cdce2cc3a65b7ba69c316fa86a9333)
Signed-off-by: David Nyström <david.nystrom@est.tech>
Signed-off-by: Steve Sakoman <steve@sakoman.com>