I hope nobody perceives this as a technical "question", it is not, it is more of a question in semantics. Some of the content about debian's vote on init freedom may be relevant but here is a demonstration of intrusion, I think.…

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Debian's base-passwd (sid) and logging freedom I hope nobody perceives this as a technical "question", it is not, it is more of a question in semantics.

Angriffsfläche

Enterprise IT / Cloud Infrastruktur

Exploit-Status

Geringe Ausnutzungswahrscheinlichkeit / Keine aktiven Kampagnen

Sofortmaßnahme

Hersteller-Sicherheitsupdate unverzüglich einspielen

While upgrading base-passwd among other packages in sid it asked and "warned" that two users (log and s6log) do not match Debian's default and should be deleted. If I would ask why is Debian intrusive (by deleting not just adding) in /etc (sys-admin's personal domain) the answer would be "that's Debian". The next scale of questioning would be how would two additional users be a burden to any linux (unix) system? The 3rd line of questioning would have been what if my user name was systemd-log ... would the installer allow me "in"?

So in light of the init elections I am thinking logging freedom is becoming an issue as well.

Here is the output of the warnings and their wording. Note how it says software may not work if those logging accounts are not removed. Since when?

' ┌─────┤ Configuring base-passwd ├────┐

│ update-passwd has found a difference between your system accounts and the current Debian defaults. It │

│ is advisable to allow update-passwd to change your system; without those changes some packages might not │

│ work correctly. For more documentation on the Debian account policies, please see │

│ /usr/share/doc/base-passwd/README.

│ The proposed change is: │ Remove group "log" (19) │

│ If you allow this change, a backup of modified files will be made with the extension .org, which you can │

│ use if necessary to restore the current settings. If you do not make this change now, you can make it │

│ later with the update-passwd utility. │

│ Do you want to remove the group log?

│ <Yes> <No> │

└───────────────────────────────────────────┘

┌───────┤ Configuring base-passwd ├─────┐

│ update-passwd has found a difference between your system accounts and the current Debian defaults. It │

│ is advisable to allow update-passwd to change your system; without those changes some packages might not │

│ work correctly. For more documentation on the Debian account policies, please see │

│ /usr/share/doc/base-passwd/README.

│ The proposed change is:

│ Remove user "s6log" (19) │

│ If you allow this change, a backup of modified files will be made with the extension .org, which you can │

│ use if necessary to restore the current settings. If you do not make this change now, you can make it │

│ later with the update-passwd utility.

│ Do you want to remove the user s6log?

│ <Yes> <No> │

└──────────────────────────────────┘ '

submitted by /u/fungalnet
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1 Warnungen

title: Detect Exploitation - Debian's base-passwd (sid) and logging freedom
id: 74532027-2ba8-4105-94ef-cc828622db23
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
  - https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-27
logsource:
  category: network_connection
  product: any
detection:
  selection:
      CommandLine|contains:
        - 'exploit'
  condition: selection
falsepositives:
  - Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
  - attack.initial_access

Syntax validiert (0 Fehler)

rule CTI_Threat_Indicator {
    meta:
        author = "iShareStuff CTI Automated Detection Engine"
        date = "2026-09-27"
        description = "YARA Signature for "
    strings:
        $str = "Debian\'s base-passwd (sid) and" ascii wide
    condition:
        any of them
}

Syntax validiert (0 Fehler)

index=security sourcetype IN ("cisco:asa", "pan:traffic", "zeek_conn", "suricata", "WinEventLog:Security")
("Debians base-passwd sid and logging free")
| stats count earliest(_time) as first_seen latest(_time) as last_seen by src_ip, dest_ip, dest_host, signature
| eval first_seen=strftime(first_seen, "%Y-%m-%d %H:%M:%S"), last_seen=strftime(last_seen, "%Y-%m-%d %H:%M:%S")
| sort - count

Syntax validiert (0 Fehler)

message: "*Debians base-passwd sid and logging free*"

Syntax validiert (0 Fehler)

CommonSecurityLog
| where Message has "Debians base-passwd sid and logging free"
| summarize EventCount = count(), FirstSeen = min(TimeGenerated), LastSeen = max(TimeGenerated) by SourceIP, DestinationIP, DestinationPort, Activity
| extend DetectionRule = "iShareStuff-CTI-Compiled"
| sort by EventCount desc

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MITRE ATT&CK Matrix Navigator 14 Taktiken

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Impact

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Debian's base-passwd (sid) and logging freedom

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Debian's base-passwd (sid) and logging freedom

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SOC Incident Playbook: Remote Code Execution (RCE) Defense

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MITRE ATT&CK Matrix Navigator 14 Taktiken

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