Bug 2331486

Summary: Allow setcap() syscall for 'sssd_selinux_manager_t'
Product: [Fedora] Fedora Reporter: Alexey Tikhonov <atikhono>
Component: selinux-policyAssignee: Zdenek Pytela <zpytela>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: medium    
Version: 41CC: dwalsh, ipedrosa, lvrabec, mmalik, omosnacek, pkoncity, vmojzis, zpytela
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Hardware: Unspecified   
OS: Linux   
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Fixed In Version: selinux-policy-41.27-1.fc41 Doc Type: If docs needed, set a value
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Last Closed: 2024-12-20 13:39:32 UTC Type: ---
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Description Alexey Tikhonov 2024-12-10 18:39:48 UTC 
This is a clone of upstream request https://github.com/fedora-selinux/selinux-policy/issues/2455

SSSD was reworked to not rely on effective capabilities but to raise a permitted capability when needed, and drop it completely when not needed anymore (specific PR that triggered this ticket - https://github.com/SSSD/sssd/pull/7731)

This approach conflicts with current `sssd_selinux_manager_t` policy:
"""
**type=AVC** msg=audit(1733309927.245:4711): avc:  **denied  { setcap }** for  pid=43967 comm="selinux_child" **scontext=system_u:system_r:sssd_selinux_manager_t:s0** tcontext=system_u:system_r:sssd_selinux_manager_t:s0 tclass=process permissive=1
**type=SYSCALL** msg=audit(1733309927.245:4711): arch=c000003e syscall=126 success=yes exit=0 a0=55795759750c a1=557957597514 a2=557957597514 a3=80 items=0 ppid=41662 pid=43967 auid=4294967295 uid=990 gid=986 euid=990 suid=990 fsuid=990 egid=986 sgid=986 fsgid=986 tty=(none) ses=4294967295 comm="selinux_child" exe="/usr/libexec/sssd/selinux_child" subj=system_u:system_r:sssd_selinux_manager_t:s0 key=(null)ARCH=x86_64 SYSCALL=capset AUID="unset" UID="sssd" GID="sssd" EUID="sssd" SUID="sssd" FSUID="sssd" EGID="sssd" SGID="sssd" FSGID="sssd"
**type=CAPSET** msg=audit(1733309927.245:4711): pid=43967 cap_pi=0000000000000080 cap_pp=00000000000000c0 cap_pe=0000000000000080 cap_pa=0
"""

Relevant policy that needs to be fixed:
https://github.com/fedora-selinux/selinux-policy/blob/8dfcddb1f7227bbdf98776f795be53cf50734b04/policy/modules/contrib/sssd.te#L283

This change will land Fedora 41+ (https://bodhi.fedoraproject.org/updates/FEDORA-2024-5afdb12065, https://bodhi.fedoraproject.org/updates/FEDORA-2024-61dea2e6ce) and C10S soon.

Reproducible: Always
Comment 1 Fedora Update System 2024-12-18 08:57:54 UTC 
FEDORA-2024-98cb37f64a (selinux-policy-41.27-1.fc41) has been submitted as an update to Fedora 41.
https://bodhi.fedoraproject.org/updates/FEDORA-2024-98cb37f64a
Comment 2 Fedora Update System 2024-12-19 03:58:07 UTC 
FEDORA-2024-98cb37f64a has been pushed to the Fedora 41 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2024-98cb37f64a`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2024-98cb37f64a

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 3 Fedora Update System 2024-12-20 13:39:32 UTC 
FEDORA-2024-98cb37f64a (selinux-policy-41.27-1.fc41) has been pushed to the Fedora 41 stable repository.
If problem still persists, please make note of it in this bug report.