FreeBSD mksnap_ffs security bypass
|freebsd-mksnapffs-bypass-security (15005)||Medium Risk|
FreeBSD could allow a local attacker to bypass security restrictions, caused by a vulnerability in the mksnap_ffs program. When a snapshot is created, the mksnap_ffs program may cause other flags to be reset to default values, which could disable security settings previously set on the system. This would allow a local attacker to bypass security restrictions, when a process using the mksnap_ffs program is run.
Upgrade to the latest version of FreeBSD (RELENG_5_1 or RELENG_5_2 security branch dated later than 2004-01-27), as listed in FreeBSD Security Advisory FreeBSD-SA-04:01.mksnap_ffs. See References.
— OR —
Apply the patch for this vulnerability, as listed in FreeBSD Security Advisory FreeBSD-SA-04:01.mksnap_ffs. See References.
- FreeBSD Security Advisory FreeBSD-SA-04:01: mksnap_ffs clears file system options.
- BID-9533: FreeBSD mksnap_ffs File System Option Reset Vulnerability
- CVE-2004-0099: mksnap_ffs in FreeBSD 5.1 and 5.2 only sets the snapshot flag when creating a snapshot for a file system, which causes default values for other flags to be used, possibly disabling security-critical settings and allowing a local user to bypass intended access restrictions.
- OSVDB ID: 3790: FreeBSD mksnap_ffs Filesystem Flag Clearing Security Issue
- FreeBSD FreeBSD 5.1
- FreeBSD FreeBSD 5.2
Jan 30, 2004
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