CVE-2017-10914

Description

The grant-table feature in Xen through 4.8.x has a race condition leading to a double free, which allows guest OS users to cause a denial of service (memory consumption), or possibly obtain sensitive information or gain privileges, aka XSA-218 bug 2.

CVSS Metrics

• v3.0•HIGH•Score: 8.1CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
• v2.0•MEDIUM•Score: 6.8AV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.60%• Percentile: 70%

Techniques & Countermeasures

• CWE-362•Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

  The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

• CWE-415•Double Free

  The product calls free() twice on the same memory address.

Affected Systems

• xen•xen

  ≤ 4.8.1

References (6)

• http://www.securitytracker.com/id/1038722
• https://security.gentoo.org/glsa/201708-03
• http://www.debian.org/security/2017/dsa-3969
• http://www.securityfocus.com/bid/99411
• https://xenbits.xen.org/xsa/advisory-218.html
• https://security.gentoo.org/glsa/201710-17