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CVE-2020-29040

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Date: November 24, 2020

An issue was discovered in Xen through 4.14.x allowing x86 HVM guest OS users to cause a denial of service (stack corruption), cause a data leak, or possibly gain privileges because of an off-by-one error. NOTE: this issue is caused by an incorrect fix for CVE-2020-27671.

Language: C

Severity Score

Related Resources (7)

http://xenbits.xen.org/xsa/advisory-355.html
https://security.alpinelinux.org/vuln/CVE-2020-29040
https://nvd.nist.gov/vuln/detail/CVE-2020-29040
https://xenbits.xen.org/xsa/advisory-355.html
https://security-tracker.debian.org/tracker/CVE-2020-29040
http://www.openwall.com/lists/oss-security/2021/01/19/4
https://www.mend.io/vulnerability-database/CVE-2020-29040

Severity Score

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

Off-by-one Error

CWE-193

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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