Description
xend in Xen 3.3.0 does not properly restrict a guest VM's write access within the /local/domain xenstore directory tree, which allows guest OS users to cause a denial of service and possibly have unspecified other impact by writing to (1) console/tty, (2) console/limit, or (3) image/device-model-pid. NOTE: this issue exists because of erroneous set_permissions calls in the fix for CVE-2008-4405.
References
- xen-xend-xenstore-dos(47668) vdb-entry
- [xen-devel] 20081218 Re: PATCH: Actually make /local/domain/$DOMID readonly to the guest mailing-list
- [xen-devel] 20081218 Re: PATCH: Actually make /local/domain/$DOMID readonly to the guest mailing-list
- [xen-devel] 20081218 Re: PATCH: Actually make /local/domain/$DOMID readonly to the guest mailing-list
- 31499 vdb-entry
- [oss-security] 20081219 CVE Request -- Xen (Upstream patch for CVE-2008-4405 is incomplete) mailing-list
- [xen-devel] 20081218 PATCH: Actually make /local/domain/$DOMID readonly to the guest mailing-list