CVE-2021-28709
VMware x86 Guest P2M Update Vulnerabilities (Hypercalls)
Description
issues with partially successful P2M updates on x86 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). In some cases the hypervisor carries out the requests by splitting them into smaller chunks. Error handling in certain PoD cases has been insufficient in that in particular partial success of some operations was not properly accounted for. There are two code paths affected - page removal (CVE-2021-28705) and insertion of new pages (CVE-2021-28709). (We provide one patch which combines the fix to both issues.)
INFO
Published Date :
Nov. 24, 2021, 2:15 a.m.
Last Modified :
Feb. 4, 2024, 8:15 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
Affected Products
The following products are affected by CVE-2021-28709
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-28709.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-28709 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-28709 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Feb. 04, 2024
Action Type Old Value New Value Added Reference Xen Project https://security.gentoo.org/glsa/202402-07 [No types assigned] -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference Xen Project https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/ [No types assigned] Added Reference Xen Project https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/ [No types assigned] Removed Reference Xen Project https://lists.fedoraproject.org/archives/list/[email protected]/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/ Removed Reference Xen Project https://lists.fedoraproject.org/archives/list/[email protected]/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/ -
Modified Analysis by [email protected]
Dec. 10, 2021
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/ Mailing List, Third Party Advisory Changed Reference Type https://www.debian.org/security/2021/dsa-5017 No Types Assigned https://www.debian.org/security/2021/dsa-5017 Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Dec. 09, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/ [No Types Assigned] -
CVE Modified by [email protected]
Dec. 06, 2021
Action Type Old Value New Value Added Reference https://www.debian.org/security/2021/dsa-5017 [No Types Assigned] -
CVE Modified by [email protected]
Dec. 01, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/ [No Types Assigned] -
Initial Analysis by [email protected]
Nov. 30, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://xenbits.xenproject.org/xsa/advisory-389.txt No Types Assigned https://xenbits.xenproject.org/xsa/advisory-389.txt Patch, Vendor Advisory Added CWE NIST CWE-755 Added CPE Configuration OR *cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* versions from (including) 3.4.0 up to (including) 4.12.4 *cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* versions from (including) 4.13.0 up to (including) 4.13.4 *cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* versions from (including) 4.14.0 up to (including) 4.14.3 *cpe:2.3:o:xen:xen:4.15.0:*:*:*:*:*:x86:* *cpe:2.3:o:xen:xen:4.15.1:*:*:*:*:*:x86:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-28709 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-28709
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.06 }} 0.00%
score
0.25162
percentile