PRIOn knowledge basePRION:CVE-2009-1630Design/Logic Flaw
The nfs_permission function in fs/nfs/dir.c in the NFS client implementation in the Linux kernel 2.6.29.3 and earlier, when atomic_open is available, does not check execute (aka EXEC or MAY_EXEC) permission bits, which allows local users to bypass permissions and execute files, as demonstrated by files on an NFSv4 fileserver.
References
article.gmane.org/gmane.linux.nfs/26592
bugzilla.linux-nfs.org/show_bug.cgi?id=131
linux-nfs.org/pipermail/nfsv4/2006-November/005313.html
linux-nfs.org/pipermail/nfsv4/2006-November/005323.html
lists.opensuse.org/opensuse-security-announce/2009-06/msg00001.html
lists.opensuse.org/opensuse-security-announce/2009-07/msg00004.html
secunia.com/advisories/35106
secunia.com/advisories/35298
secunia.com/advisories/35394
secunia.com/advisories/35656
secunia.com/advisories/35847
secunia.com/advisories/36051
secunia.com/advisories/36327
secunia.com/advisories/37471
wiki.rpath.com/Advisories:rPSA-2009-0111
www.debian.org/security/2009/dsa-1809
www.debian.org/security/2009/dsa-1844
www.debian.org/security/2009/dsa-1865
www.mandriva.com/security/advisories?name=MDVSA-2009:135
www.mandriva.com/security/advisories?name=MDVSA-2009:148
www.openwall.com/lists/oss-security/2009/05/13/2
www.redhat.com/support/errata/RHSA-2009-1157.html
www.securityfocus.com/archive/1/505254/100/0/threaded
www.securityfocus.com/archive/1/507985/100/0/threaded
www.securityfocus.com/bid/34934
www.ubuntu.com/usn/usn-793-1
www.vmware.com/security/advisories/VMSA-2009-0016.html
www.vupen.com/english/advisories/2009/1331
www.vupen.com/english/advisories/2009/3316
bugzilla.redhat.com/show_bug.cgi?id=500297
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8543
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9990
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