Description
ncpfs 2.2.6 and earlier attempts to use (1) ncpmount to append to the /etc/mtab file and (2) ncpumount to append to the /etc/mtab.tmp file without first checking whether resource limits would interfere, which allows local users to trigger corruption of the /etc/mtab file via a process with a small RLIMIT_FSIZE value, a related issue to CVE-2011-1089.
References
- [oss-security] 20110314 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- [oss-security] 20110303 Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- [oss-security] 20110322 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- [oss-security] 20110322 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- [oss-security] 20110305 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=688980
- [oss-security] 20110307 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- ncpfs-mtab-security-bypass(66701) vdb-entry
- [oss-security] 20110401 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- [oss-security] 20110304 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- [oss-security] 20110314 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- [oss-security] 20110331 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- [oss-security] 20110304 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- [oss-security] 20110314 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- [oss-security] 20110303 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- [oss-security] 20110305 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- [oss-security] 20110331 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list
- [oss-security] 20110315 Re: Suid mount helpers fail to anticipate RLIMIT_FSIZE mailing-list