CVE-2009-1630

MEDIUM

Description

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

http://article.gmane.org/gmane.linux.nfs/26592

http://bugzilla.linux-nfs.org/show_bug.cgi?id=131

http://linux-nfs.org/pipermail/nfsv4/2006-November/005313.html

http://linux-nfs.org/pipermail/nfsv4/2006-November/005323.html

http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00001.html

http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00004.html

http://secunia.com/advisories/35106

http://secunia.com/advisories/35298

http://secunia.com/advisories/35394

http://secunia.com/advisories/35656

http://secunia.com/advisories/35847

http://secunia.com/advisories/36051

http://secunia.com/advisories/36327

http://secunia.com/advisories/37471

http://wiki.rpath.com/Advisories:rPSA-2009-0111

http://www.debian.org/security/2009/dsa-1809

http://www.debian.org/security/2009/dsa-1844

http://www.debian.org/security/2009/dsa-1865

http://www.mandriva.com/security/advisories?name=MDVSA-2009:135

http://www.mandriva.com/security/advisories?name=MDVSA-2009:148

http://www.openwall.com/lists/oss-security/2009/05/13/2

http://www.redhat.com/support/errata/RHSA-2009-1157.html

http://www.securityfocus.com/archive/1/505254/100/0/threaded

http://www.securityfocus.com/archive/1/507985/100/0/threaded

http://www.securityfocus.com/bid/34934

http://www.ubuntu.com/usn/usn-793-1

http://www.vmware.com/security/advisories/VMSA-2009-0016.html

http://www.vupen.com/english/advisories/2009/1331

http://www.vupen.com/english/advisories/2009/3316

https://bugzilla.redhat.com/show_bug.cgi?id=500297

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8543

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9990

Details

Source: MITRE

Published: 2009-05-14

Updated: 2018-10-10

Type: CWE-264

Risk Information

CVSS v2.0

Base Score: 4.4

Vector: (AV:L/AC:M/Au:N/C:P/I:P/A:P)

Impact Score: 6.4

Exploitability Score: 3.4

Severity: MEDIUM