CVE-2022-33742

7.1HIGH

Key Information:

Vendor
Linux
Status
Linux
Xen
Vendor
CVE Published:
5 July 2022

Summary

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).

Affected Version(s)

Linux consult Xen advisory XSA-403

xen consult Xen advisory XSA-403

References

https://xenbits.xenproject.org/xsa/advisory-403.txt
x_refsource_MISC
http://xenbits.xen.org/xsa/advisory-403.html
x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2022/07/05/6
mailing-listx_refsource_MLIST

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Collectors

NVD DatabaseMitre Database

Credit

{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'The issue related to not zeroing memory areas used for shared communications\nwas discovered by Roger Pau Monné of Citrix.\n\nThe issue related to leaking contiguous data in granted pages was disclosed\npublicly.'}]}}}
.