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FreeBSD mksnap_ffs Filesystem Flag Clearing Security Issue
Secunia Advisory:	SA10756	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2004-02-02
Popularity:	7,642 views

Critical:	Less critical
Impact:	Security Bypass
Where:	Local system
Solution Status:	Vendor Patch

OS:	FreeBSD 5.x

Subscribe:	Instant alerts on relevant vulnerabilities

CVE reference:	CVE-2004-0099

Description: Kimura Fuyuki and Wiktor Niesiobedzki have discovered a security issue in FreeBSD, which potentially can set insecure permissions on a file system. An error in the "mksnap_ffs" program may reset flags on a file system to their default setting when a snapshot is created. This could potentially disable various security-related features set by an administrator when a process using the program is run (e.g. a regularly scheduled backup). The problem affects FreeBSD 5.1-RELEASE and 5.2-RELEASE. Solution: Apply patches or install updated version. FreeBSD 5.1: ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:01/mksnap_ffs_5_1.patch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:01/mksnap_ffs_5_1.patch.asc FreeBSD 5.2: ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:01/mksnap_ffs_5_2.patch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:01/mksnap_ffs_5_2.patch.asc The security issue has been fixed in the following releases: * 2004-01-27 19:33:16 UTC (RELENG_5_1, 5.1-RELEASE-p12) * 2004-01-29 22:54:31 UTC (RELENG_5_2, 5.2-RELEASE-p1) Provided and/or discovered by: Kimura Fuyuki and Wiktor Niesiobedzki Original Advisory: ftp://ftp.FreeBSD.org/pub/FreeBSD/CER...ories/FreeBSD-SA-04:01.mksnap_ffs.asc

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