Vulnerability Name: | CVE-2020-29486 (CCN-193135) | ||||||||||||
Assigned: | 2020-12-15 | ||||||||||||
Published: | 2020-12-15 | ||||||||||||
Updated: | 2021-12-10 | ||||||||||||
Summary: | An issue was discovered in Xen through 4.14.x. Nodes in xenstore have an ownership. In oxenstored, a owner could give a node away. However, node ownership has quota implications. Any guest can run another guest out of quota, or create an unbounded number of nodes owned by dom0, thus running xenstored out of memory A malicious guest administrator can cause a denial of service against a specific guest or against the whole host. All systems using oxenstored are vulnerable. Building and using oxenstored is the default in the upstream Xen distribution, if the Ocaml compiler is available. Systems using C xenstored are not vulnerable. | ||||||||||||
CVSS v3 Severity: | 6.0 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H) 5.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
3.9 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
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CVSS v2 Severity: | 4.9 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
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Vulnerability Type: | CWE-770 | ||||||||||||
Vulnerability Consequences: | Denial of Service | ||||||||||||
References: | Source: MITRE Type: CNA CVE-2020-29486 Source: XF Type: UNKNOWN xen-cve202029486-dos(193135) Source: FEDORA Type: Mailing List, Third Party Advisory FEDORA-2020-df772b417b Source: FEDORA Type: Mailing List, Third Party Advisory FEDORA-2020-64859a826b Source: GENTOO Type: Third Party Advisory GLSA-202107-30 Source: DEBIAN Type: Third Party Advisory DSA-4812 Source: CCN Type: Xen Security Advisory XSA-352 oxenstored: node ownership can be changed by unprivileged clients Source: MISC Type: Patch, Vendor Advisory https://xenbits.xenproject.org/xsa/advisory-352.html | ||||||||||||
Vulnerable Configuration: | Configuration 1: Configuration 2: Configuration 3: Configuration CCN 1: ![]() | ||||||||||||
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