National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2020-11742 Detail

Current 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.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 5.5 MEDIUM
Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00006.html
http://www.openwall.com/lists/oss-security/2020/04/14/4 Mitigation Patch Third Party Advisory
http://xenbits.xen.org/xsa/advisory-318.html Patch Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5M2XRNCHOGGTJQBZQJ7DCV6ZNAKN3LE2/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NVTP4OYHCTRU3ONFJOFJQVNDFB25KLLG/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YMAW7D2MP6RE4BFI5BZWOBBWGY3VSOFN/ Third Party Advisory
https://security.gentoo.org/glsa/202005-08
https://xenbits.xen.org/xsa/advisory-318.html Patch Vendor Advisory

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-Other Other NIST  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
4.13.0
 cpe:2.3:o:xen:xen:4.13.0:rc1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:xen:xen:4.13.0:rc2:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 2 ( hide )
 cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

8 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-11742
NVD Published Date:
04/14/2020
NVD Last Modified:
05/14/2020