SuSE-SA:2004:001: Linux Kernel
High Nessus Plugin ID 13820
SynopsisThe remote host is missing a vendor-supplied security patch
DescriptionThe remote host is missing the patch for the advisory SuSE-SA:2004:001 (Linux Kernel).
The do_mremap() function of the Linux Kernel is used to manage (move, resize) Virtual Memory Areas (VMAs). By exploiting an incorrect bounds check in do_mremap() during the remapping of memory it is possible to create a VMA with the size of 0.
In normal operation do_mremap() leaves a memory hole of one page and creates an additional VMA of two pages. In case of exploitation no hole is created but the new VMA has a 0 bytes length.
The Linux Kernel's memory management is corrupted from this point and can be abused by local users to gain root privileges.
There is no temporary workaround for this bug.
Please note that on 8.1, the kernel-source package may not be installable through rpm, because of a bug in RPM (update of the kernel source RPM may take 30 minutes or more, or fail entirely). Owing to this problem, the kernel source is not available as a regular YOU update.
However, recognizing our obligation to publish the source along with the binary packages, we are making the source available as a compressed tar archive, downloadable from the normal FTP locations