Information disclosure in Xen

CVE-2013-4368

The outs instruction emulation in Xen 3.1.x, 4.2.x, 4.3.x, and earlier, when using FS: or GS: segment override, uses an uninitialized variable as a segment base, which allows local 64-bit PV guests to obtain sensitive information (hypervisor stack content) via unspecified vectors related to stale data in a segment register.

Vulnerability class: Information Disclosure

EPSS: 0.004 (29.4th percentile) — read the EPSS interpretation.

Affected products

  • Xen — versions 3.0.2, 3.0.3, 3.0.4
  • N/a — versions n/a

Weakness classification (CWE)

References