In the Linux kernel, the following vulnerability has been resolved: fs: Pass AT_GETATTR_NOSEC flag to getattr interface function When vfs_getattr_nosec() calls a filesystem's getattr interface function then the 'nosec' should propagate into this function so that vfs_getattr_nosec() can again be called from the filesystem's gettattr rather than vfs_getattr(). The latter would add unnecessary security checks that the initial vfs_getattr_nosec() call wanted to avoid. Therefore, introduce the getattr flag GETATTR_NOSEC and allow to pass with the new getattr_flags parameter to the getattr interface function. In overlayfs and ecryptfs use this flag to determine which one of the two functions to call. In a recent code change introduced to IMA vfs_getattr_nosec() ended up calling vfs_getattr() in overlayfs, which in turn called security_inode_getattr() on an exiting process that did not have current->fs set anymore, which then caused a kernel NULL pointer dereference. With this change the call to security_inode_getattr() can be avoided, thus avoiding the NULL pointer dereference.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - In the Linux kernel, the following vulnerability has been resolved: fs: Pass AT_GETATTR_NOSEC flag to
    getattr interface function When vfs_getattr_nosec() calls a filesystem's getattr interface function then
    the 'nosec' should propagate into this function so that vfs_getattr_nosec() can again be called from the
    filesystem's gettattr rather than vfs_getattr(). The latter would add unnecessary security checks that the
    initial vfs_getattr_nosec() call wanted to avoid. Therefore, introduce the getattr flag GETATTR_NOSEC and
    allow to pass with the new getattr_flags parameter to the getattr interface function. In overlayfs and
    ecryptfs use this flag to determine which one of the two functions to call. In a recent code change
    introduced to IMA vfs_getattr_nosec() ended up calling vfs_getattr() in overlayfs, which in turn called
    security_inode_getattr() on an exiting process that did not have current->fs set anymore, which then
    caused a kernel NULL pointer dereference. With this change the call to security_inode_getattr() can be
    avoided, thus avoiding the NULL pointer dereference. (CVE-2023-52779)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - In the Linux kernel, the following vulnerability has been resolved: fs: Pass AT_GETATTR_NOSEC flag to     getattr interface function When vfs_getattr_nosec() calls a filesystem's getattr interface function then     the 'nosec' should propagate into this function so that vfs_getattr_nosec() can again be called from the     filesystem's gettattr rather than vfs_getattr(). The latter would add unnecessary security checks that the     initial vfs_getattr_nosec() call wanted to avoid. Therefore, introduce the getattr flag GETATTR_NOSEC and     allow to pass with the new getattr_flags parameter to the getattr interface function. In overlayfs and     ecryptfs use this flag to determine which one of the two functions to call. In a recent code change     introduced to IMA vfs_getattr_nosec() ended up calling vfs_getattr() in overlayfs, which in turn called     security_inode_getattr() on an exiting process that did not have current->fs set anymore, which then     caused a kernel NULL pointer dereference. With this change the call to security_inode_getattr() can be     avoided, thus avoiding the NULL pointer dereference. (CVE-2023-52779)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
451415	Google: sys-kernel/lakitu-kernel-6_1: security update to 18137.0.0	Tenable Cloud Security	Google COS Security Checks	Local	medium
451415	Google: sys-kernel/lakitu-kernel-6_1: security update to 18137.0.0	Tenable Self-Hosted Container Security	Google COS Security Checks	Local	medium
246241	Linux Distros Unpatched Vulnerability : CVE-2023-52779	Nessus	Misc.	Local	medium

Detections

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CVE-2023-52779

medium

Tenable Plugins

medium

medium

medium