description: Xenstore: guests can let run xenstored out of memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Malicious guests can cause xenstored to allocate vast amounts of memory, eventually resulting in a Denial of Service (DoS) of xenstored. There are multiple ways how guests can cause large memory allocations in xenstored: - - by issuing new requests to xenstored without reading the responses, causing the responses to be buffered in memory - - by causing large number of watch events to be generated via setting up multiple xenstore watches and then e.g. deleting many xenstore nodes below the watched path - - by creating as many nodes as allowed with the maximum allowed size and path length in as many transactions as possible - - by accessing many nodes inside a transaction
problem types: unknown
affected:
{
vendor: Xen
product: xen
versions:
version: consult Xen advisory XSA-326, status: unknown
}
metrics:
other: [
type: unknown
content: {'description': {'description_data': [{'lang': 'eng', 'value': 'Unprivileged guests can cause a DoS of xenstored, resulting in the\ninability to create new guests or modify the configuration of running\nguests.'}]}}
]