An issue was discovered in Xen 4.5.x through 4.9.x. The function `__gnttab_cache_flush` handles GNTTABOP_cache_flush grant table operations. It checks to see if the calling domain is the owner of the page that is to be operated on. If it is not, the owner's grant table is checked to see if a grant mapping to the calling domain exists for the page in question. However, the function does not check to see if the owning domain actually has a grant table or not. Some special domains, such as `DOMID_XEN`, `DOMID_IO` and `DOMID_COW` are created without grant tables. Hence, if __gnttab_cache_flush operates on a page owned by these special domains, it will attempt to dereference a NULL pointer in the domain struct.
References
| Link | Resource |
|---|---|
| http://www.securityfocus.com/bid/100817 | Third Party Advisory VDB Entry |
| http://www.securitytracker.com/id/1039349 | Third Party Advisory VDB Entry |
| http://xenbits.xen.org/xsa/advisory-232.html | Patch Vendor Advisory |
| https://support.citrix.com/article/CTX227185 | |
| https://www.debian.org/security/2017/dsa-4050 |
Configurations
Configuration 1 (hide)
|
History
No history.
Information
Published : 2017-09-12 15:29
Updated : 2023-12-10 12:15
NVD link : CVE-2017-14318
Mitre link : CVE-2017-14318
CVE.ORG link : CVE-2017-14318
JSON object : View
Products Affected
xen
- xen
CWE
CWE-476
NULL Pointer Dereference