mirror of
https://github.com/CVEProject/cvelist.git
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102 lines
4.6 KiB
JSON
102 lines
4.6 KiB
JSON
{
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"CVE_data_meta": {
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"ASSIGNER": "cve@mitre.org",
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"ID": "CVE-2020-11739",
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"STATE": "PUBLIC"
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},
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"affects": {
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"vendor": {
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"vendor_data": [
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{
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"product": {
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"product_data": [
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{
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"product_name": "n/a",
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"version": {
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"version_data": [
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{
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"version_value": "n/a"
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}
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]
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}
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}
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]
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},
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"vendor_name": "n/a"
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}
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]
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}
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},
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"data_format": "MITRE",
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"data_type": "CVE",
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"data_version": "4.0",
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"description": {
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"description_data": [
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{
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"lang": "eng",
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"value": "An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service or possibly gain privileges because of missing memory barriers in read-write unlock paths. The read-write unlock paths don't contain a memory barrier. On Arm, this means a processor is allowed to re-order the memory access with the preceding ones. In other words, the unlock may be seen by another processor before all the memory accesses within the \"critical\" section. As a consequence, it may be possible to have a writer executing a critical section at the same time as readers or another writer. In other words, many of the assumptions (e.g., a variable cannot be modified after a check) in the critical sections are not safe anymore. The read-write locks are used in hypercalls (such as grant-table ones), so a malicious guest could exploit the race. For instance, there is a small window where Xen can leak memory if XENMAPSPACE_grant_table is used concurrently. A malicious guest may be able to leak memory, or cause a hypervisor crash resulting in a Denial of Service (DoS). Information leak and privilege escalation cannot be excluded."
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}
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]
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},
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"problemtype": {
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"problemtype_data": [
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{
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"description": [
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{
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"lang": "eng",
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"value": "n/a"
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}
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]
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}
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]
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},
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"references": {
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"reference_data": [
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{
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"url": "https://xenbits.xen.org/xsa/advisory-314.html",
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"refsource": "MISC",
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"name": "https://xenbits.xen.org/xsa/advisory-314.html"
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},
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{
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"refsource": "CONFIRM",
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"name": "http://xenbits.xen.org/xsa/advisory-314.html",
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"url": "http://xenbits.xen.org/xsa/advisory-314.html"
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},
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{
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"refsource": "MLIST",
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"name": "[oss-security] 20200414 Xen Security Advisory 314 v3 (CVE-2020-11739) - Missing memory barriers in read-write unlock paths",
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"url": "http://www.openwall.com/lists/oss-security/2020/04/14/2"
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},
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{
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"refsource": "FEDORA",
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"name": "FEDORA-2020-440457afe4",
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"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YMAW7D2MP6RE4BFI5BZWOBBWGY3VSOFN/"
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},
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{
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"refsource": "FEDORA",
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"name": "FEDORA-2020-295ed0b1e0",
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"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5M2XRNCHOGGTJQBZQJ7DCV6ZNAKN3LE2/"
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},
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{
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"refsource": "SUSE",
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"name": "openSUSE-SU-2020:0599",
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"url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00006.html"
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},
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{
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"refsource": "FEDORA",
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"name": "FEDORA-2020-cbc3149753",
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"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NVTP4OYHCTRU3ONFJOFJQVNDFB25KLLG/"
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},
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{
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"refsource": "GENTOO",
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"name": "GLSA-202005-08",
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"url": "https://security.gentoo.org/glsa/202005-08"
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},
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{
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"refsource": "DEBIAN",
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"name": "DSA-4723",
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"url": "https://www.debian.org/security/2020/dsa-4723"
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}
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]
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}
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} |