CVE-2022-33740

Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend (CVE-2022-26365, CVE-2022-33740). Additionally the granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend (CVE-2022-33741, CVE-2022-33742).

CVSS v3.0 7.1 HIGH
CVSS v2.0 3.6 LOW

7.1^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

3.6^/10

CVSS v2.0 : LOW

Vector : AV:L/AC:L/Au:N/C:P/I:N/A:P

Exploitability : 3.9 / Impact : 4.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://xenbits.xenproject.org/xsa/advisory-403.txt	Vendor Advisory
http://xenbits.xen.org/xsa/advisory-403.html	Patch Vendor Advisory
http://www.openwall.com/lists/oss-security/2022/07/05/6	Mailing List Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IGFTRZ66KQYTSYIRT5FRHF5D6O72NWOP/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/
https://www.debian.org/security/2022/dsa-5191
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:xen:xen:-:::::::*
	cpe:2.3:o:linux:linux_kernel:-:::::::*
	cpe:2.3:o:fedoraproject:fedora:36:::::::*

Information

Published : 2022-07-05 06:15

Updated : 2022-10-02 12:15

NVD link : CVE-2022-33740

Mitre link : CVE-2022-33740

JSON object : View

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

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Products Affected

fedoraproject

fedora

xen

xen

linux

linux_kernel

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