[Pkg-cacti-maint] Bug#923309: cacti-spine_1.1.37-2~bpo9+1 fails to run under non-root user

[Paul Gevers]

Hi Paul, Allan,

@Paul, Thanks for reporting this issue. Please check the existing
comments in bug 904332

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=904332

@Sven can you please help us and maybe explain how Paul should be using
the cacti-spine binary with these Linux capabilities enabled that we
added in that version by your patch. I guess he needs to install
libcap2-bin and run $(chmod u-s /usr/sbin/spine)

Paul

On 26-02-2019 07:39, Paul Allen wrote:
> Package: cacti-spine
> Version: 1.1.37-1~bpo9+1
> Severity: normal
> 
> Dear Maintainer,
> 
> 
>    * What led up to the situation?
>         Upgrading from cacti-spine_1.1.37-1~bpo9+1 to cacti-spine_1.1.37-2~bpo9+1 caused execution of cacti-spine for non-root users to break, even with setuid bits set for either just user or all.
>    * What exactly did you do (or not do) that was effective (or
>      ineffective)?
>         Attempted to set setuid bits on /usr/sbin/spine to permit execution by non-root users (eg, cacti). Attempted to debug by running "/usr/sbnin/spine -H=180 -R -S -V=5" and "/usr/sbin/spine -h" as both root and cacti users.
>    * What was the outcome of this action?
>         /usr/sbin/spine would fail silently when executed by cacti user but would run successfully when executed by root user. Example: 
>     cacti at mon1:~# /usr/sbin/spine -H=180 -R -S -V=5
>     cacti at mon1:~#
>     cacti at mon1:~# /usr/sbin/spine -h
>     cacti at mon1:~#
> 
>    * What outcome did you expect instead?
>         Expected spine to execute successfully for non-root cacti user once setuid bit(s) were set.
> 
> Re-installing cacti-spine_1.1.37-2~bpo9+1 had no effect, Removing and re-adding setuid bits had no effect. Once I rolled the package back to cacti-spine_1.1.37-1~bpo9+1 and set the setuid bit for the user it started executing successfully again for the no-root cacti user with no other changes necessary.
> 
> 
> 
> -- System Information:
> Debian Release: 9.8
>   APT prefers stable-updates
>   APT policy: (500, 'stable-updates'), (500, 'stable')
> Architecture: amd64 (x86_64)
> 
> Kernel: Linux 4.9.0-6-amd64 (SMP w/16 CPU cores)
> Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
> Init: systemd (via /run/systemd/system)
> 
> Versions of packages cacti-spine depends on:
> ii  cacti                  1.1.38+ds1-1~bpo9+1
> ii  dbconfig-no-thanks     2.0.11~bpo9+1
> ii  debconf [debconf-2.0]  1.5.61
> ii  libc6                  2.24-11+deb9u4
> ii  libmariadbclient18     10.1.37-0+deb9u1
> ii  libsnmp30              5.7.3+dfsg-1.7+deb9u1
> ii  ucf                    3.0036
> 
> cacti-spine recommends no packages.
> 
> Versions of packages cacti-spine suggests:
> ii  snmp-mibs-downloader  1.1+nmu1
> 
> -- no debconf information
>