CVE-2017-14318
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
Se ha descubierto un problema en Xen desde las versiones 4.5.x hasta las 4.9.x. La función `__gnttab_cache_flush` gestiona operaciones de tabla de concesión GNTTABOP_cache_flush. Comprueba si el dominio de llamada es el propietario de la página en la que se tiene que operar. Si no lo es, la tabla de concesión del propietario se comprueba para ver si existe una asignación de concesión al dominio de llamada para la página en cuestión. Sin embargo, la función no comprueba si el dominio de propietario tiene una tabla de concesión o no. Algunos dominios especiales como `DOMID_XEN`, `DOMID_IO` y `DOMID_COW` se crean sin tablas de concesión. Por lo tanto, si __gnttab_cache_flush opera en una página poseída por estos dominios especiales, intentará desreferenciar un puntero NULL en la estructura del dominio.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2017-09-12 CVE Reserved
- 2017-09-12 CVE Published
- 2023-03-08 EPSS Updated
- 2024-08-05 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-476: NULL Pointer Dereference
CAPEC
References (5)
| URL | Tag | Source |
|---|---|---|
| http://www.securityfocus.com/bid/100817 | Third Party Advisory | |
| http://www.securitytracker.com/id/1039349 | Third Party Advisory | |
| https://support.citrix.com/article/CTX227185 | X_refsource_confirm |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| http://xenbits.xen.org/xsa/advisory-232.html | 2017-11-30 |
| URL | Date | SRC |
|---|---|---|
| https://www.debian.org/security/2017/dsa-4050 | 2017-11-30 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.5.0 Search vendor "Xen" for product "Xen" and version "4.5.0" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.5.1 Search vendor "Xen" for product "Xen" and version "4.5.1" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.5.2 Search vendor "Xen" for product "Xen" and version "4.5.2" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.5.3 Search vendor "Xen" for product "Xen" and version "4.5.3" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.5.5 Search vendor "Xen" for product "Xen" and version "4.5.5" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.6.0 Search vendor "Xen" for product "Xen" and version "4.6.0" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.6.1 Search vendor "Xen" for product "Xen" and version "4.6.1" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.6.3 Search vendor "Xen" for product "Xen" and version "4.6.3" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.6.4 Search vendor "Xen" for product "Xen" and version "4.6.4" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.6.5 Search vendor "Xen" for product "Xen" and version "4.6.5" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.6.6 Search vendor "Xen" for product "Xen" and version "4.6.6" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.7.0 Search vendor "Xen" for product "Xen" and version "4.7.0" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.7.1 Search vendor "Xen" for product "Xen" and version "4.7.1" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.7.2 Search vendor "Xen" for product "Xen" and version "4.7.2" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.7.3 Search vendor "Xen" for product "Xen" and version "4.7.3" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.8.0 Search vendor "Xen" for product "Xen" and version "4.8.0" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.8.1 Search vendor "Xen" for product "Xen" and version "4.8.1" | - |
Affected
| ||||||
| Xen Search vendor "Xen" | Xen Search vendor "Xen" for product "Xen" | 4.9.0 Search vendor "Xen" for product "Xen" and version "4.9.0" | - |
Affected
| ||||||