Computer Security
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BSD systems securelevel protection bypass
updated since 09.01.2006
SecurityVulns ID:5609
Threat Level:
Description:By mounting different filesystem it's possible to mask file flagged 'immutable'. It's possible to rollback system tiime by setting it to maximum value.
Affected:NETBSD : NetBSD 1.6
 LINUX : kernel 2.6
 NETBSD : NetBSD 2.0
 FREEBSD : FreeBSD 6.0
 FREEBSD : FreeBSD 7.0
 DRAGONFLY : DragonFly 1.2
 NETBSD : NetBSD 2.1
Original documentdocumentNETBSD, NetBSD Security Advisory 2006-002: settimeofday() time wrap (10.01.2006)
 documentRedTeam Pentesting, [Full-disclosure] Time modification flaw in BSD securelevels on NetBSD and Linux (09.01.2006)
 documentRedTeam Pentesting, [Full-disclosure] BSD Securelevels: Circumventing protection of files flagged immutable (09.01.2006)

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