Date: Sun, 25 May 2014 23:51:14 -0400 From: Jason Hellenthal <jhellenthal@dataix.net> To: "Ronald F. Guilmette" <rfg@tristatelogic.com> Cc: "freebsd-security@freebsd.org" <freebsd-security@freebsd.org> Subject: Re: NEVERMIND! (was: Local Denial of Service: logger(1)) Message-ID: <61CB0E46-3969-4A00-866E-731F44E0B29A@dataix.net> In-Reply-To: <2218.1401075427@server1.tristatelogic.com> References: <2218.1401075427@server1.tristatelogic.com>
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--Apple-Mail-5BF8CCF0-33C6-4757-9988-E861765ADBAF Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable That and/or you could just disallow the use of logger to that of just a spec= ial group say staff and modify the mtree(8) files to keep the changes.=20 These are just medial tasks into hardening a system for its specific needs. s= ecurity/logcheck should pick up these events pretty quickly and shoot out an= email to your admin group to alert them of the miscreant :-) --=20 Jason Hellenthal Voice: 95.30.17.6/616 JJH48-ARIN > On May 25, 2014, at 23:37, "Ronald F. Guilmette" <rfg@tristatelogic.com> w= rote: >=20 >=20 > In message <2091.1401074804@server1.tristatelogic.com>, I wrote: >=20 >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> #!/bin/sh >>=20 >> while (1) >> dd if=3D/dev/random bs=3D15 count=3D1 | od -c | xargs logger >> end >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >=20 > DUH! >=20 > I forgot that newsyslog(8) should limit the size of /var/log/messages, and= > that as long as you limit the size of that to a reasnable value, and as > long as you have newsyslog(8) only keeping a finite & reasonable number > of "rotated out" copies, then /var won't fill up. >=20 > My apologies to everyone for the distraction. > _______________________________________________ > freebsd-security@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-security > To unsubscribe, send any mail to "freebsd-security-unsubscribe@freebsd.org= " --Apple-Mail-5BF8CCF0-33C6-4757-9988-E861765ADBAF Content-Type: application/pkcs7-signature; name=smime.p7s Content-Disposition: attachment; filename=smime.p7s Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIUOTCCBjAw ggUYoAMCAQICAwaijjANBgkqhkiG9w0BAQsFADCBjDELMAkGA1UEBhMCSUwxFjAUBgNVBAoTDVN0 YXJ0Q29tIEx0ZC4xKzApBgNVBAsTIlNlY3VyZSBEaWdpdGFsIENlcnRpZmljYXRlIFNpZ25pbmcx ODA2BgNVBAMTL1N0YXJ0Q29tIENsYXNzIDEgUHJpbWFyeSBJbnRlcm1lZGlhdGUgQ2xpZW50IENB MB4XDTEzMDUxODA4NTA0OFoXDTE0MDUxOTIyMDk0N1owSDEfMB0GA1UEAwwWamhlbGxlbnRoYWxA ZGF0YWl4Lm5ldDElMCMGCSqGSIb3DQEJARYWamhlbGxlbnRoYWxAZGF0YWl4Lm5ldDCCASIwDQYJ 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