Resource Exhaustion Affecting xen package, versions <4.8.4+xsa273+shim4.10.1+xsa273-1+deb9u10
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN9-XEN-366395
- published22 Aug 2018
- disclosed17 Aug 2018
Introduced: 17 Aug 2018
CVE-2018-15470 (opens in a new tab)How to fix?
Upgrade Debian:9 xen to version 4.8.4+xsa273+shim4.10.1+xsa273-1+deb9u10 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Debian.
See How to fix? for Debian:9 relevant fixed versions and status.
An issue was discovered in Xen through 4.11.x. The logic in oxenstored for handling writes depended on the order of evaluation of expressions making up a tuple. As indicated in section 7.7.3 "Operations on data structures" of the OCaml manual, the order of evaluation of subexpressions is not specified. In practice, different implementations behave differently. Thus, oxenstored may not enforce the configured quota-maxentity. This allows a malicious or buggy guest to write as many xenstore entries as it wishes, causing unbounded memory usage in oxenstored. This can lead to a system-wide DoS.