Vulnerability Name:

CVE-2021-28704 (CCN-213955)

Assigned:2021-11-23
Published:2021-11-23
Updated:2022-06-28
Summary:PoD operations on misaligned GFNs T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] x86 HVM and PVH guests may be started in populate-on-demand (PoD) mode, to provide a way for them to later easily have more memory assigned. Guests are permitted to control certain P2M aspects of individual pages via hypercalls. These hypercalls may act on ranges of pages specified via page orders (resulting in a power-of-2 number of pages). The implementation of some of these hypercalls for PoD does not enforce the base page frame number to be suitably aligned for the specified order, yet some code involved in PoD handling actually makes such an assumption. These operations are XENMEM_decrease_reservation (CVE-2021-28704) and XENMEM_populate_physmap (CVE-2021-28707), the latter usable only by domains controlling the guest, i.e. a de-privileged qemu or a stub domain. (Patch 1, combining the fix to both these two issues.) In addition handling of XENMEM_decrease_reservation can also trigger a host crash when the specified page order is neither 4k nor 2M nor 1G (CVE-2021-28708, patch 2).
CVSS v3 Severity:8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H)
7.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
6.2 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
5.4 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:6.9 Medium (CVSS v2 Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-noinfo
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-28704

Source: CCN
Type: Xen Security Advisory XSA-388
PoD operations on misaligned GFNs

Source: XF
Type: UNKNOWN
xen-cve202128704-dos(213955)

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-03645e9807

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-2b3a2de94f

Source: DEBIAN
Type: Third Party Advisory
DSA-5017

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2021-28704

Source: MISC
Type: Patch, Vendor Advisory
https://xenbits.xenproject.org/xsa/advisory-388.txt

Vulnerable Configuration:Configuration 1:
  • cpe:/o:xen:xen:*:*:*:*:*:*:x86:* (Version >= 4.7.0 and <= 4.15.1)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:34:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:35:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:xensource:xen:4.7:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.8:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.9:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.10:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.11:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.12:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.13:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.14:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.12.3:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.12.4:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.13.1:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.10:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:8073
    P
    		xstream-1.4.20-150200.3.25.1 on GA media (Moderate)
    2023-06-20
    oval:org.opensuse.security:def:8007
    P
    		flatpak-builder-1.2.2-150400.1.9 on GA media (Moderate)
    2023-06-20
    oval:org.opensuse.security:def:51989
    P
    		Security update for xen (Important)
    2023-01-26
    oval:org.opensuse.security:def:3730
    P
    		openssh-7.2p2-74.45.1 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3536
    P
    		kbd-2.0.4-8.10.2 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:94648
    P
    		libjavascriptcoregtk-4_0-18-2.36.0-150400.2.13 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:100086
    P
    		 (Moderate)
    2022-03-04
    oval:org.opensuse.security:def:106752
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:9071
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:70517
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:99576
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:106067
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:92626
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:69767
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:98987
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:92037
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:99775
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:106266
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:10377
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:92825
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:69966
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:99182
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:105677
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:9627
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:92232
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:106465
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:8876
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:99377
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:105872
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:9826
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:92427
    P
    		Security update for xen (Moderate)
    2021-12-09
    oval:org.opensuse.security:def:73941
    P
    		Security update for xen (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:829
    P
    		Security update for xen (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:99442
    P
    		 (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:67349
    P
    		Security update for xen (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:100693
    P
    		 (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:1650
    P
    		Security update for xen (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:111827
    P
    		Security update for xen (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:99705
    P
    		 (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:101560
    P
    		Security update for xen (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:64819
    P
    		Security update for xen (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:76417
    P
    		Security update for xen (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:100029
    P
    		 (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:6260
    P
    		Security update for xen (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:69162
    P
    		Security update for xen (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:102226
    P
    		Security update for xen (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:99171
    P
    		 (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:42247
    P
    		Security update for xen (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:100364
    P
    		 (Moderate)
    2021-12-07
    oval:org.opensuse.security:def:111152
    P
    		Security update for xen (Moderate)
    2021-12-06
    oval:org.opensuse.security:def:95456
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:102169
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:64625
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:108027
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:76065
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:96088
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:5908
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:69096
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:117541
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:102778
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:108835
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:42143
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:118540
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:73747
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:66997
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:109444
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:101361
    P
    		Security update for xen (Moderate)
    2021-12-03
    oval:org.opensuse.security:def:33747
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:60425
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:89483
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:85778
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:125634
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:31712
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:58876
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:88225
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:23716
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:5162
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:10179
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:34005
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:57137
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:86176
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:126801
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:9425
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:32230
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:59570
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:88542
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:24001
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:84244
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:8678
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:34602
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:57535
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:86694
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:127198
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:33053
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:59828
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:89225
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:26175
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:84702
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:70319
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:31314
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:58053
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:87517
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:51704
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:69565
    P
    		Security update for xen (Moderate)
    2021-12-01
    oval:org.opensuse.security:def:29452
    P
    		Security update for xen (Moderate)
    2021-11-29
    oval:org.opensuse.security:def:56097
    P
    		Security update for xen (Moderate)
    2021-11-29
    oval:org.opensuse.security:def:83481
    P
    		Security update for xen (Moderate)
    2021-11-29
    oval:org.opensuse.security:def:30154
    P
    		Security update for xen (Moderate)
    2021-11-29
    oval:org.opensuse.security:def:55275
    P
    		Security update for xen (Moderate)
    2021-11-29
    oval:org.opensuse.security:def:30274
    P
    		Security update for xen (Moderate)
    2021-11-29
    oval:org.opensuse.security:def:82659
    P
    		Security update for xen (Moderate)
    2021-11-29
    oval:org.opensuse.security:def:55977
    P
    		Security update for xen (Moderate)
    2021-11-29
    oval:org.opensuse.security:def:83361
    P
    		Security update for xen (Moderate)
    2021-11-29
    BACK
    xen xen *
    fedoraproject fedora 34
    fedoraproject fedora 35
    debian debian linux 9.0
    xensource xen 4.7
    xensource xen 4.8
    xensource xen 4.9
    xensource xen 4.10
    xensource xen 4.11
    xensource xen 4.12
    xensource xen 4.13
    xensource xen 4.14
    xensource xen 4.12.3
    xensource xen 4.12.4
    xensource xen 4.13.1
    xensource xen 4.10