Details
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Bug
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Status: Open
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Major - P3
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Resolution: Unresolved
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None
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None
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None
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None
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ALL
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Security 2022-10-17, Security 2022-10-31, Security 2022-11-14, Security 2022-11-28, Security 2022-12-12, Security 2022-12-26, Security 2023-01-09, Security 2023-01-23, Security 2023-02-06, Security 2023-04-03
Description
Hi.
MongoDB 6.0 running on Rocky Linux 8.
We have noticed that the MongoDB server process is denied "write" access to the log file after it is rotated, as per this documentation:
https://www.mongodb.com/docs/manual/tutorial/rotate-log-files/#forcing-a-log-rotation-with-sigusr1
Restarting the mongod.service systemd unit does not produce the same denial.
It looks like the mongod process is requesting "write" access after the "kill", instead of "append", and being denied access because it has not been granted this permission.
MongoDB 5.0 running on Rocky Linux 8 is OK.
Additional information:
sudo ausearch -m avc
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time->Tue Sep 20 03:46:01 2022
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type=PROCTITLE msg=audit(1663641961.899:759879): proctitle=2F7573722F62696E2F6D6F6E676F64002D66002F6574632F6D6F6E676F642E636F6E66
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type=PATH msg=audit(1663641961.899:759879): item=1 name="/var/log/mongodb/mongod.log" inode=8440224 dev=fd:03 mode=0100640 ouid=993 ogid=990 rdev=00:00 obj=system_u:object_r:mongod_log_t:s0 nametype=NORMAL cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 cap_frootid=0
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type=PATH msg=audit(1663641961.899:759879): item=0 name="/var/log/mongodb/" inode=8440193 dev=fd:03 mode=040755 ouid=993 ogid=990 rdev=00:00 obj=system_u:object_r:mongod_log_t:s0 nametype=PARENT cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 cap_frootid=0
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type=CWD msg=audit(1663641961.899:759879): cwd="/"
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type=SYSCALL msg=audit(1663641961.899:759879): arch=c000003e syscall=257 success=no exit=-13 a0=ffffff9c a1=55d9d0d28a20 a2=241 a3=1b6 items=2 ppid=1 pid=1565 auid=4294967295 uid=993 gid=990 euid=993 suid=993 fsuid=993 egid=990 sgid=990 fsgid=990 tty=(none) ses=4294967295 comm="SignalHandler" exe="/usr/bin/mongod" subj=system_u:system_r:mongod_t:s0 key=(null)
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type=AVC msg=audit(1663641961.899:759879): avc: denied { write } for pid=1565 comm="SignalHandler" name="mongod.log" dev="dm-3" ino=8440224 scontext=system_u:system_r:mongod_t:s0 tcontext=system_u:object_r:mongod_log_t:s0 tclass=file permissive=0
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ps -ef | grep mongo
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system_u:system_r:mongod_t:s0 mongod 1565 1 2 Sep15 ? 03:17:55 /usr/bin/mongod -f /etc/mongod.conf |
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sudo lsof -p 1565 | grep mongod.log |
mongod 1565 mongod 6w REG 253,3 32082779 8440194 /var/log/mongodb/mongod.log-20220915 |
sudo semanage fcontext --list | grep "/var/log/mongodb"
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/var/log/mongodb(/.*)? all files system_u:object_r:mongod_log_t:s0
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sudo sesearch --allow --source mongod_t --target mongod_log_t --class file
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allow daemon logfile:file { append getattr ioctl lock };
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allow domain file_type:file map; [ domain_can_mmap_files ]:True
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allow mongod_t mongod_log_t:file { append create getattr ioctl lock open rename setattr };
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{{}}
Attachments
Issue Links
- related to
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SERVER-36251 change logfile permissions.
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- Closed
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