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fix(pam): pass profile names to pam-auth-update --remove #376

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fix(pam): pass profile names to pam-auth-update --remove #376

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14 changes: 13 additions & 1 deletion debian/security-misc-shared.postrm
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,19 @@ true "
"

## https://forums.whonix.org/t/is-security-misc-suitable-for-hardening-bridges-and-relays/8299/11
pam-auth-update --package --remove "$DPKG_MAINTSCRIPT_PACKAGE"
## Reconciliation safety net; the authoritative early-disable is in prerm. By the
## time postrm runs dpkg has deleted this package's /usr/share/pam-configs/ files,
## so a plain reconciliation drops the now-file-less profiles from common-*.
## Plain '--package' only (no '--remove <profiles>'): on upgrade/abort states the
## config files are still present and '--remove' would strip live hardening
## mid-transaction, so those states are deliberately not matched here.
case "$1" in
remove|purge|disappear)
if command -v pam-auth-update >/dev/null 2>&1; then
pam-auth-update --package
fi
;;
esac

rm -f /etc/sysctl.d/30_security-misc_aslr-mmap.conf

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20 changes: 19 additions & 1 deletion debian/security-misc-shared.prerm
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,25 @@ true "
"

if [ "$1" = remove ]; then
pam-auth-update --package --remove "$DPKG_MAINTSCRIPT_PACKAGE"
## 'pam-auth-update --remove' matches pam-config FILENAMES under
## /usr/share/pam-configs/, not the package name. Disable our profiles while
## the helper scripts they reference under /usr/libexec/security-misc/ still
## exist (before dpkg deletes them), so /etc/pam.d/common-* is never left
## referencing a deleted module -- block-unsafe-logins is a Priority 1100
## 'requisite' whose dangling reference would fail all logins. See
## pam-auth-update(8). Keep in sync with security-misc-shared.install and
## usr/share/pam-configs/.
if command -v pam-auth-update >/dev/null 2>&1; then
pam-auth-update --package --remove \
block-unsafe-logins-security-misc \
console-lockdown-security-misc \
faillock-preauth-security-misc \
mkhomedir-security-misc \
pam-abort-on-locked-password-security-misc \
umask-security-misc \
unix-faillock-security-misc \
wheel-security-misc
fi
fi

true "INFO: debhelper beginning here."
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