CVE-2017-14316

Description

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.

CVSS Metrics

• v3.0•HIGH•Score: 8.8CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
• v2.0•HIGH•Score: 7.2AV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 0.04%• Percentile: 12%

Techniques & Countermeasures

• CWE-125•Out-of-bounds Read

  The product reads data past the end, or before the beginning, of the intended buffer.

Affected Systems

• xen•xen

  ≤ 4.9.0

References (6)

• http://www.securityfocus.com/bid/100818
• http://xenbits.xen.org/xsa/advisory-231.html
• https://support.citrix.com/article/CTX227185
• https://www.debian.org/security/2017/dsa-4050
• https://lists.debian.org/debian-lts-announce/2018/10/msg00009.html
• http://www.securitytracker.com/id/1039348