Kernel: xfrm: null pointer dereference in xfrm_update_ae_params()
CVE-2023-3772

5.5MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8.6 Extended Update Support
Red Hat Enterprise Linux 8.8 Extended Update Support
Red Hat Enterprise Linux 9
Vendor
CVE Published:
25 July 2023

What is CVE-2023-3772?

A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in xfrm_update_ae_params(), leading to a possible kernel crash and denial of service.

Affected Version(s)

Red Hat Enterprise Linux 8 0:4.18.0-513.5.1.rt7.307.el8_9

Red Hat Enterprise Linux 8 0:4.18.0-513.5.1.el8_9

Red Hat Enterprise Linux 8.6 Extended Update Support 0:4.18.0-372.87.1.el8_6

References

https://access.redhat.com/errata/RHSA-2023:6583
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:6901
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:7077
vendor-advisoryx_refsource_REDHAT

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Lin Ma (ZJU & Ant Security Light-Year Lab) for reporting this issue.
.