--- title: CVE-2007-0004 description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2007-0004 --- # CVE-2007-0004 Publication date 18 September 2007 Last updated 24 July 2024 --- Ubuntu priority **Low** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description The NFS client implementation in the kernel in Red Hat Enterprise Linux (RHEL) 3, when a filesystem is mounted with the noacl option, checks permissions for the open system call via vfs\_permission (mode bits) data rather than an NFS ACCESS call to the server, which allows local client processes to obtain a false success status from open calls that the server would deny, and possibly obtain sensitive information about file permissions on the server, as demonstrated in a root\_squash environment. NOTE: it is uncertain whether any scenarios involving this issue cross privilege boundaries. [Read the notes from the security team](https://ubuntu.com/security/CVE-2007-0004#notes) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ## Notes --- ### [jdstrand](https://launchpad.net/~jdstrand) affects kernel nfs client implementation in RedHat 3. This is a 2.4 series kernel. RedHat 4 (2.6.9) is not affected. Ignoring ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-0004) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2007-0004) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2007-0004) * [Debian](https://security-tracker.debian.org/tracker/CVE-2007-0004) ### Other references * *