CVE-2017-14318
Fixed in a distro release EPSS <1%
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.
Products: xen
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.10 | xen | 4.9.0-r4 |
| Alpine 3.11 | xen | 4.9.0-r4 |
| Alpine 3.12 | xen | 4.9.0-r4 |
| Alpine 3.13 | xen | 4.9.0-r4 |
| Alpine 3.14 | xen | 4.9.0-r4 |
| Alpine 3.15 | xen | 4.9.0-r4 |
| Alpine 3.16 | xen | 4.9.0-r4 |
| Alpine 3.17 | xen | 4.9.0-r4 |
| Alpine 3.18 | xen | 4.9.0-r4 |
| Alpine 3.19 | xen | 4.9.0-r4 |
| Alpine 3.20 | xen | 4.9.0-r4 |
| Alpine 3.21 | xen | 4.9.0-r4 |
| Alpine 3.22 | xen | 4.9.0-r4 |
| Alpine 3.23 | xen | 4.9.0-r4 |
| Alpine 3.24 | xen | 4.9.0-r4 |
| Alpine 3.3 | xen | 4.6.3-r9 |
| Alpine 3.4 | xen | 4.6.3-r11 |
| Alpine 3.5 | xen | 4.7.2-r2 |
| Alpine 3.6 | xen | 4.8.2-r1 |
| Alpine 3.7 | xen | 4.9.0-r4 |
| Alpine 3.8 | xen | 4.9.0-r4 |
| Alpine 3.9 | xen | 4.9.0-r4 |
| Debian 12 | xen | 4.8.2+xsa245-0+deb9u1 |
| Debian 13 | xen | 4.8.2+xsa245-0+deb9u1 |
| Debian 14 | xen | 4.8.2+xsa245-0+deb9u1 |
| Debian 7 | xen | 4.1.6.lts1-9 |
| Debian 9 | xen | 4.8.2+xsa245-0+deb9u1 |
| SUSE Linux Enterprise Desktop 12 SP2 | xen | 4.7.3_04-43.12.1 |
| SUSE Linux Enterprise Desktop 12 SP3 | xen | 4.9.0_12-3.15.1 |
| SUSE Linux Enterprise Server 12 SP1-LTSS | xen | 4.5.5_16-22.28.1 |
| SUSE Linux Enterprise Server 12 SP2 | xen | 4.7.3_04-43.12.1 |
| SUSE Linux Enterprise Server 12 SP3 | xen | 4.9.0_12-3.15.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP1 | xen | 4.5.5_16-22.28.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | xen | 4.7.3_04-43.12.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | xen | 4.9.0_12-3.15.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP2 | xen | 4.7.3_04-43.12.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP3 | xen | 4.9.0_12-3.15.1 |
| SUSE OpenStack Cloud 6 | xen | 4.5.5_16-22.28.1 |
| Ubuntu 16.04 LTS | xen | 4.6.5-0ubuntu1.4 |