Re: sendmail dropping outgoing email on the floor

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Carlos Puchol wrote:
self follow up ...

carlos puchol <cpg@xxxxxxxxxxxxxxxxxxxxx> wrote:

[22:27:55](3)rome:cpg# ll -L /usr/sbin/sendmail*
-rwxr-sr-x  1 root smmsp  748296 Sep  1 03:20 /usr/sbin/sendmail
-rwsr-xr-x  1 root root  2089729 Sep 13 09:20 /usr/sbin/sendmail.exim
-rwxr-xr-x  1 root root   141344 Aug  5 08:03 /usr/sbin/sendmail.postfix
-rwxr-sr-x  1 root smmsp  748296 Sep  1 03:20 /usr/sbin/sendmail.sendmail
[22:28:01](3)rome:cpg#

i can't. so -- i am baffled as to how the user/group and
the setuid was changed. i am 100% certain i did not change the
permissions or user/group by hand.


after rebooting a couple of times
i got the clientmqueue error again today and mail got dropped!
admittedly i didn't notice before because i did not try
sending email from the machine subject to this bug.

the permissions to /usr/sbin/sendmail.sendmail have
gone _again_ to a user (my user - cpg)!!!

[15:02:38](1)rome:cpg# ll -L /usr/sbin/sendmail*
-rwxr-xr-x  1 root root   141344 Aug  5 08:03 /usr/sbin/sendmail
-rwsr-xr-x  1 root root  2089729 Sep 13 09:20 /usr/sbin/sendmail.exim
-rwxr-xr-x  1 root root   141344 Aug  5 08:03 /usr/sbin/sendmail.postfix
-rwxr-xr-x  1 cpg  users  748296 Sep  1 03:20 /usr/sbin/sendmail.sendmail
[15:02:40](1)rome:cpg#


First of all: Why is /usr/sbin/sendmail a copy and not a soft-link? alternatives generates soft-links. Have you made this change by hand?

And at the moment you are using a copy of postfix and not sendmail.


i don't know how this can happen. this seems quite dangerous!
thankfully the setuid is no longer there, but this seems awfully
"close" to a security issue - some process is (incorrectly) changing
permissions of sensitive system files.

more later when i have a chance to debug this ...


This is really strange. I have not seen this before.

-c



--
Thomas Woerner
Software Engineer            Phone: +49-711-96437-310
Red Hat GmbH                 Fax  : +49-711-96437-111
Hauptstaetterstr. 58         Email: Thomas Woerner <twoerner@xxxxxxxxxx>
D-70178 Stuttgart            Web  : http://www.redhat.de/


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