CVE-2023-3773

Kernel: xfrm: out-of-bounds read of xfrma_mtimer_thresh nlattr

Description

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 cause a 4 byte out-of-bounds read of XFRMA_MTIMER_THRESH when parsing netlink attributes, leading to potential leakage of sensitive heap data to userspace.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory redhat.com
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 9
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2023:6583 vendor advisory
https://access.redhat.com/security/cve/CVE-2023-3773 vdb entry third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2218944 issue tracking third party advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
https://www.debian.org/security/2023/dsa-5492

Frequently Asked Questions

What is the severity of CVE-2023-3773?
CVE-2023-3773 has been scored as a medium severity vulnerability.
How to fix CVE-2023-3773?
To fix CVE-2023-3773, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-3773 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-3773 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-3773?
CVE-2023-3773 affects Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 9.
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