Public bug reported:

Hello,

I'm using 19.04 (Disco Dingo), kernel: 5.0.0-13-generic amd64

packages:
ii  libcharon-standard-plugins     5.7.1-1ubuntu2
ii  libstrongswan                  5.7.1-1ubuntu2
ii  libstrongswan-standard-plugins 5.7.1-1ubuntu2
ii  strongswan                     5.7.1-1ubuntu2
ii  strongswan-charon              5.7.1-1ubuntu2
ii  strongswan-libcharon           5.7.1-1ubuntu2
ii  strongswan-starter             5.7.1-1ubuntu2

/etc/strongswan.conf - https://pastebin.com/gwPfedeS

strongswan error:
Apr 24 15:47:23 ubuntu-1904-2 ipsec[1422]: 00[LIB] dropping capabilities 
failed: Operation not permitted
Apr 24 15:47:23 ubuntu-1904-2 ipsec[1422]: 00[DMN] capability dropping failed - 
aborting charon

strongswan logs - https://pastebin.com/VeqBewZx

starter charon - https://pastebin.com/QNYPGSN8

capset({version=_LINUX_CAPABILITY_VERSION_3, pid=0},
{effective=1<<CAP_DAC_OVERRIDE|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW,
permitted=1<<CAP_DAC_OVERRIDE|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW,
inheritable=1<<CAP_DAC_OVERRIDE|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW}) = -1
EPERM (Operation not permitted)

I enabled the complain mode, but aa-logprof found nothing. With
user=root in strongswan.conf it starts perfectly. Also, I downgraded to
strongswan-5.3 and everything works well with the same apparmor profile.

Any ideas?

** Affects: strongswan (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1826238

Title:
  apparmor doesn't allow to start with a non-root user

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