Date: Fri, 27 Aug 1999 10:08:07 -0400 From: "Sean O'Connell" <sean@stat.Duke.EDU> To: FreeBSD security <freebsd-security@FreeBSD.ORG> Subject: Chflags vulnerability in FreeBSD? Message-ID: <19990827100807.P28256@stat.Duke.EDU>
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Hi All-
I received the following from SANS (www.sans.org) and it initimated
that there is a vulnerability in FreeBSD that had previously been
thought to only exist in BSDi:
SANS Security Digest Vol. 3 Num. 8
A) 08/05/1999 - BSDI released a security patch for the chflags problem.
The vulnerability exists in 4.0.1 and 3.1. BSDI continues to investigate
the problem to ensure all possible security concerns are addressed. For
more information see:
http://www.BSDI.COM/support/patches/patches-4.0.1/M401-014.info
http://www.BSDI.COM/support/patches/patches-3.1/M310-056.info
The followup:
SANS Digest EXTRA -- Vol. 3 Num. 8a
4) In item 10, BSDI A of the Augusts SANS Security Digest, we reported
the chflags problem as a BSDI-specific problem, when in fact other
versions of BSD kernel are effected as well as some programs (e.g.,
ssh) based on the same routine. Vendor specific information can be
found at:
http://www.BSDI.COM/support/patches/patches-4.0.1/M401-014.info
http://www.BSDI.COM/support/patches/patches-3.1/M310-056.info
http://www.ssh.fi/sshprotocols2/
http://www.openbsd.org/errata.html#chflags
Also, according to a Bugtraq posting by Adam Morrison on 08/01/1999,
NetBSD has corrected the problem and FreeBSD appears to be vulnerable.
The SANS Digest editors were unable to locate an FreeBSD specific
information regarding this problem.
Has this been addressed or fixed? If it exists, it should probably
be fixed before 3.3 gets out the door.
Thanks
S
--
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Sean O'Connell Email: sean@stat.Duke.EDU
Institute of Statistics and Decision Sciences Phone: (919) 684-5419
Duke University Fax: (919) 684-8594
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