CVE-2020-11742
Xen denials of service grant table operations vulnerability
Description
An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of bad continuation handling in GNTTABOP_copy. Grant table operations are expected to return 0 for success, and a negative number for errors. The fix for CVE-2017-12135 introduced a path through grant copy handling where success may be returned to the caller without any action taken. In particular, the status fields of individual operations are left uninitialised, and may result in errant behaviour in the caller of GNTTABOP_copy. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to copy a grant, it hits the incorrect exit path. This returns success to the caller without doing anything, which may cause crashes or other incorrect behaviour.
INFO
Published Date :
April 14, 2020, 1:15 p.m.
Last Modified :
Nov. 7, 2023, 3:15 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
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-2020-11742.
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-2020-11742 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-11742 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]
Nov. 07, 2023
Action Type Old Value New Value Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YMAW7D2MP6RE4BFI5BZWOBBWGY3VSOFN/ [No types assigned] Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5M2XRNCHOGGTJQBZQJ7DCV6ZNAKN3LE2/ [No types assigned] Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NVTP4OYHCTRU3ONFJOFJQVNDFB25KLLG/ [No types assigned] Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/YMAW7D2MP6RE4BFI5BZWOBBWGY3VSOFN/ Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/5M2XRNCHOGGTJQBZQJ7DCV6ZNAKN3LE2/ Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/NVTP4OYHCTRU3ONFJOFJQVNDFB25KLLG/ -
CVE Modified by [email protected]
Jul. 13, 2020
Action Type Old Value New Value Added Reference https://www.debian.org/security/2020/dsa-4723 [No Types Assigned] -
CVE Modified by [email protected]
May. 15, 2020
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202005-08 [No Types Assigned] -
CVE Modified by [email protected]
May. 11, 2020
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/NVTP4OYHCTRU3ONFJOFJQVNDFB25KLLG/ [No Types Assigned] -
CVE Modified by [email protected]
May. 02, 2020
Action Type Old Value New Value Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00006.html [No Types Assigned] -
CVE Modified by [email protected]
May. 01, 2020
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/5M2XRNCHOGGTJQBZQJ7DCV6ZNAKN3LE2/ [No Types Assigned] -
Initial Analysis by [email protected]
Apr. 30, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type http://www.openwall.com/lists/oss-security/2020/04/14/4 No Types Assigned http://www.openwall.com/lists/oss-security/2020/04/14/4 Mitigation, Patch, Third Party Advisory Changed Reference Type http://xenbits.xen.org/xsa/advisory-318.html No Types Assigned http://xenbits.xen.org/xsa/advisory-318.html Patch, Vendor Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/YMAW7D2MP6RE4BFI5BZWOBBWGY3VSOFN/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/YMAW7D2MP6RE4BFI5BZWOBBWGY3VSOFN/ Third Party Advisory Changed Reference Type https://xenbits.xen.org/xsa/advisory-318.html No Types Assigned https://xenbits.xen.org/xsa/advisory-318.html Patch, Vendor Advisory Added CWE NIST NVD-CWE-Other Added CPE Configuration OR *cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* versions up to (including) 4.13.0 *cpe:2.3:o:xen:xen:4.13.0:rc1:*:*:*:*:*:* *cpe:2.3:o:xen:xen:4.13.0:rc2:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Apr. 25, 2020
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/YMAW7D2MP6RE4BFI5BZWOBBWGY3VSOFN/ [No Types Assigned] -
CVE Modified by [email protected]
Apr. 14, 2020
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2020/04/14/4 [No Types Assigned] -
CVE Modified by [email protected]
Apr. 14, 2020
Action Type Old Value New Value Added Reference http://xenbits.xen.org/xsa/advisory-318.html [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-11742 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-2020-11742
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.12065
percentile