Описание
Security update for xen
This update for xen fixes several issues.
These security issues were fixed:
- CVE-2017-14316: Missing bound check in function
alloc_heap_pagesfor an internal array allowed attackers using crafted hypercalls to execute arbitrary code within Xen (XSA-231, bsc#1056278) - CVE-2017-14318: The function __gnttab_cache_flush missed a check for grant tables, allowing a malicious guest to crash the host or for x86 PV guests to potentially escalate privileges (XSA-232, bsc#1056280)
- CVE-2017-14317: A race in cxenstored may have cause a double-free allowind for DoS of the xenstored daemon (XSA-233, bsc#1056281).
- CVE-2017-14319: An error while handling grant mappings allowed malicious or buggy x86 PV guest to escalate its privileges or crash the hypervisor (XSA-234, bsc#1056282).
Список пакетов
SUSE Linux Enterprise Server 12 SP1-LTSS
SUSE Linux Enterprise Server for SAP Applications 12 SP1
SUSE OpenStack Cloud 6
Ссылки
- Link for SUSE-SU-2017:2466-1
- E-Mail link for SUSE-SU-2017:2466-1
- SUSE Security Ratings
- SUSE Bug 1056278
- SUSE Bug 1056280
- SUSE Bug 1056281
- SUSE Bug 1056282
- SUSE CVE CVE-2017-14316 page
- SUSE CVE CVE-2017-14317 page
- SUSE CVE CVE-2017-14318 page
- SUSE CVE CVE-2017-14319 page
Описание
A parameter verification issue was discovered in Xen through 4.9.x. The function `alloc_heap_pages` allows callers to specify the first NUMA node that should be used for allocations through the `memflags` parameter; the node is extracted using the `MEMF_get_node` macro. While the function checks to see if the special constant `NUMA_NO_NODE` is specified, it otherwise does not handle the case where `node >= MAX_NUMNODES`. This allows an out-of-bounds access to an internal array.
Затронутые продукты
Ссылки
- CVE-2017-14316
- SUSE Bug 1056278
- SUSE Bug 1072198
- SUSE Bug 1072223
Описание
A domain cleanup issue was discovered in the C xenstore daemon (aka cxenstored) in Xen through 4.9.x. When shutting down a VM with a stubdomain, a race in cxenstored may cause a double-free. The xenstored daemon may crash, resulting in a DoS of any parts of the system relying on it (including domain creation / destruction, ballooning, device changes, etc.).
Затронутые продукты
Ссылки
- CVE-2017-14317
- SUSE Bug 1056281
- SUSE Bug 1178658
Описание
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.
Затронутые продукты
Ссылки
- CVE-2017-14318
- SUSE Bug 1056280
Описание
A grant unmapping issue was discovered in Xen through 4.9.x. When removing or replacing a grant mapping, the x86 PV specific path needs to make sure page table entries remain in sync with other accounting done. Although the identity of the page frame was validated correctly, neither the presence of the mapping nor page writability were taken into account.
Затронутые продукты
Ссылки
- CVE-2017-14319
- SUSE Bug 1056282
- SUSE Bug 1072198
- SUSE Bug 1072223
- SUSE Bug 1178658