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CVE-2018-15470

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 201810-06
Posted Oct 31, 2018
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201810-6 - Multiple vulnerabilities have been found in Xen, the worst of which could cause a Denial of Service condition. Versions less than 4.10.1-r2 are affected.

tags | advisory, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2017-5715, CVE-2017-5753, CVE-2017-5754, CVE-2018-10471, CVE-2018-10472, CVE-2018-10981, CVE-2018-10982, CVE-2018-12891, CVE-2018-12892, CVE-2018-12893, CVE-2018-15468, CVE-2018-15469, CVE-2018-15470, CVE-2018-3620, CVE-2018-3646, CVE-2018-5244, CVE-2018-7540, CVE-2018-7541, CVE-2018-7542
SHA-256 | b217f9accfba4a764bd6f85c953f7739d90f11d6b6ba34b105c6fadfa4adafee
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