Qemu: 9pfs: suid/sgid bits not dropped on file write
CVE-2023-1386

7.8HIGH

Key Information:

Vendor

Red Hat
Status
Qemu
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
24 July 2023

What is CVE-2023-1386?

An identified flaw in QEMU's 9p passthrough filesystem (9pfs) enables local users within a guest to manipulate executable files with SUID or SGID without proper restrictions on these privileged bits. In specific scenarios, this vulnerability can be exploited by malicious individuals in the guest environment, facilitating unauthorized privilege elevation within the guest and potentially impacting the host system's security.

References

https://access.redhat.com/security/cve/CVE-2023-1386
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2223985
issue-trackingx_refsource_REDHAT
https://github.com/advisories/GHSA-ppj8-867g-rgjr

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2023-1386 : Qemu: 9pfs: suid/sgid bits not dropped on file write