Vulnerability Name:

CVE-2020-29480 (CCN-193141)

Assigned:2020-12-15
Published:2020-12-15
Updated:2021-07-21
Summary:An issue was discovered in Xen through 4.14.x. Neither xenstore implementation does any permission checks when reporting a xenstore watch event. A guest administrator can watch the root xenstored node, which will cause notifications for every created, modified, and deleted key. A guest administrator can also use the special watches, which will cause a notification every time a domain is created and destroyed. Data may include: number, type, and domids of other VMs; existence and domids of driver domains; numbers of virtual interfaces, block devices, vcpus; existence of virtual framebuffers and their backend style (e.g., existence of VNC service); Xen VM UUIDs for other domains; timing information about domain creation and device setup; and some hints at the backend provisioning of VMs and their devices. The watch events do not contain values stored in xenstore, only key names. A guest administrator can observe non-sensitive domain and device lifecycle events relating to other guests. This information allows some insight into overall system configuration (including the number and general nature of other guests), and configuration of other guests (including the number and general nature of other guests' devices). This information might be commercially interesting or might make other attacks easier. There is not believed to be exposure of sensitive data. Specifically, there is no exposure of VNC passwords, port numbers, pathnames in host and guest filesystems, cryptographic keys, or within-guest data.
CVSS v3 Severity:2.3 Low (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N)
2.0 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): None
4.4 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N)
3.9 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-203
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2020-29480

Source: XF
Type: UNKNOWN
xen-cve202029480-info-disc(193141)

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2020-df772b417b

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2020-64859a826b

Source: DEBIAN
Type: Third Party Advisory
DSA-4812

Source: CCN
Type: Xen Security Advisory XSA-115
xenstore watch notifications lacking permission checks

Source: MISC
Type: Patch, Vendor Advisory
https://xenbits.xenproject.org/xsa/advisory-115.html

Vulnerable Configuration:Configuration 1:
  • cpe:/o:xen:xen:*:*:*:*:*:*:*:* (Version <= 4.14.0)

    • Configuration 2:
  • cpe:/o:debian:debian_linux:10.0:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/o:fedoraproject:fedora:32:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:xensource:xen:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:7831
    P
    		xen-libs-4.17.0_06-150500.1.10 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:7895
    P
    		gnome-extensions-41.9-150400.3.8.1 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:7945
    P
    		libmicrohttpd-devel-0.9.57-150000.3.3.1 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:635
    P
    		Security update for rubygem-activesupport-5_1 (Moderate) (in QA)
    2022-09-29
    oval:org.opensuse.security:def:3225
    P
    		libopus0-1.1-3.1 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3535
    P
    		java-1_8_0-openjdk-1.8.0.222-27.35.2 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3192
    P
    		libjavascriptcoregtk-3_0-0-2.4.11-23.20 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3363
    P
    		screen-4.0.4-23.3.3 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:94855
    P
    		xen-libs-4.16.0_08-150400.2.12 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95168
    P
    		apache-commons-beanutils-1.9.4-1.68 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95165
    P
    		xen-4.16.0_08-150400.2.12 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:336
    P
    		xen-libs-4.14.1_16-1.6 on GA media (Moderate)
    2022-06-13
    oval:org.opensuse.security:def:388
    P
    		xen-libs-4.16.0_08-150400.2.12 on GA media (Moderate)
    2022-06-10
    oval:org.opensuse.security:def:113591
    P
    		xen-4.15.1_01-1.2 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:94475
    P
    		 (Important)
    2022-01-11
    oval:org.opensuse.security:def:5340
    P
    		Security update for libsndfile (Important)
    2022-01-05
    oval:org.opensuse.security:def:101881
    P
    		Security update for ncurses (Moderate)
    2021-10-20
    oval:org.opensuse.security:def:106977
    P
    		xen-4.15.1_01-1.2 on GA media (Moderate)
    2021-10-01
    oval:org.opensuse.security:def:96764
    P
    		qemu-tools-3.1.0-7.1 on GA media (Moderate)
    2021-09-21
    oval:org.opensuse.security:def:96773
    P
    		sharutils-4.15.2-2.21 on GA media (Moderate)
    2021-09-21
    oval:org.opensuse.security:def:96774
    P
    		shim-15+git47-1.5 on GA media (Moderate)
    2021-09-21
    oval:org.opensuse.security:def:1265
    P
    		Security update for the Linux Kernel (Live Patch 3 for SLE 15 SP3) (Important)
    2021-09-16
    oval:org.opensuse.security:def:2296
    P
    		xen-4.14.1_16-1.6 on GA media (Moderate)
    2021-08-10
    oval:org.opensuse.security:def:63385
    P
    		xen-4.14.1_16-1.6 on GA media (Moderate)
    2021-08-10
    oval:org.opensuse.security:def:101411
    P
    		xen-4.14.1_16-1.6 on GA media (Moderate)
    2021-08-10
    oval:org.opensuse.security:def:101188
    P
    		libexempi-devel-2.4.5-3.3.2 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:62354
    P
    		xen-libs-4.14.1_16-1.6 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:72095
    P
    		xen-libs-4.14.1_16-1.6 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:101112
    P
    		xen-libs-4.14.1_16-1.6 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:44024
    P
    		Security update for xen (Important)
    2021-01-07
    oval:org.opensuse.security:def:39594
    P
    		Security update for xen (Important)
    2021-01-07
    oval:org.opensuse.security:def:41032
    P
    		Security update for xen (Important)
    2021-01-05
    oval:org.opensuse.security:def:45462
    P
    		Security update for xen (Important)
    2021-01-05
    oval:org.opensuse.security:def:85566
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:31572
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:57395
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:23499
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:86036
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:32022
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:57845
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:51487
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:84088
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:86486
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:32841
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:58664
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:84543
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:31102
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:56925
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:87305
    P
    		Security update for xen (Moderate)
    2020-12-29
    oval:org.opensuse.security:def:110928
    P
    		Security update for xen (Moderate)
    2020-12-26
    oval:org.opensuse.security:def:28873
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:54696
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:75777
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:96026
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:125508
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:8537
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:69420
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:88089
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:51097
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:83170
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:108547
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:110384
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:5620
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:66709
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:33884
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:59707
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:29310
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:55133
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:81032
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:126680
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:9280
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:70174
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:88398
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:23875
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:109382
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:73574
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:117369
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:29963
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:55786
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:21359
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:82080
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:127077
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:10034
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:64452
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:102716
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:89104
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:51863
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:118478
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:69034
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:23109
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:82517
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:107854
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:33626
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:59449
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:89362
    P
    		Security update for xen (Moderate)
    2020-12-22
    oval:org.opensuse.security:def:104085
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:73403
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:91778
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:4966
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:97395
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:104791
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:64281
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:68984
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:34338
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:60161
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:98101
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:105418
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:90430
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:25979
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:75497
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:98728
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:91136
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:66429
    P
    		Security update for xen (Moderate)
    2020-12-18
    oval:org.opensuse.security:def:41884
    P
    		Security update for xen (Moderate)
    2020-12-16
    oval:org.opensuse.security:def:46314
    P
    		Security update for xen (Moderate)
    2020-12-16
    BACK
    xen xen *
    debian debian linux 10.0
    fedoraproject fedora 32
    fedoraproject fedora 33
    xensource xen *