Out-of-Bounds Affecting xen-tools package, versions <4.10.4_16-3.41.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-SLES150-XENTOOLS-2700617
  • published14 Apr 2022
  • disclosed29 Sept 2020

Introduced: 29 Sep 2020

CVE-2020-25599  (opens in a new tab)
CWE-119  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade SLES:15.0 xen-tools to version 4.10.4_16-3.41.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xen-tools package and not the xen-tools package as distributed by SLES. See How to fix? for SLES:15.0 relevant fixed versions and status.

An issue was discovered in Xen through 4.14.x. There are evtchn_reset() race conditions. Uses of EVTCHNOP_reset (potentially by a guest on itself) or XEN_DOMCTL_soft_reset (by itself covered by XSA-77) can lead to the violation of various internal assumptions. This may lead to out of bounds memory accesses or triggering of bug checks. In particular, x86 PV guests may be able to elevate their privilege to that of the host. Host and guest crashes are also possible, leading to a Denial of Service (DoS). Information leaks cannot be ruled out. All Xen versions from 4.5 onwards are vulnerable. Xen versions 4.4 and earlier are not vulnerable.

CVSS Scores

version 3.1