CVE-2023-52974: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi_tcp: Fix UAF during login when accessing the shost ipaddress If during iscsi_sw_tcp_session_create() iscsi_tcp_r2tpool_alloc() fails, userspace could be accessing the host's ipaddress attr. If we then free the session via iscsi_session_teardown() while userspace is still accessing the session we will hit a use after free bug. Set the tcp_sw_host->session after we have completed session creation and can no longer fail.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 4.14.306
linux	linux_kernel	4.15 — 4.19.273
linux	linux_kernel	4.20 — 5.4.232
linux	linux_kernel	5.5 — 5.10.168
linux	linux_kernel	5.11 — 5.15.93
linux	linux_kernel	5.16 — 6.1.11
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/0aaabdb900c7415caa2006ef580322f7eac5f6b6 https://git.kernel.org/stable/c/496af9d3682ed4c28fb734342a09e6cc0c056ea4 https://git.kernel.org/stable/c/61e43ebfd243bcbad11be26bd921723027b77441 https://git.kernel.org/stable/c/6abd4698f4c8a78e7bbfc421205c060c199554a0 https://git.kernel.org/stable/c/9758ffe1c07b86aefd7ca8e40d9a461293427ca0 https://git.kernel.org/stable/c/d4d765f4761f9e3a2d62992f825aeee593bcb6b9 https://git.kernel.org/stable/c/f484a794e4ee2a9ce61f52a78e810ac45f3fe3b3

Frequently Asked Questions

What is CVE-2023-52974? +

In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi_tcp: Fix UAF during login when accessing the shost ipaddress If during iscsi_sw_tcp_session_create() iscsi_tcp_r2tpool_alloc() fails, userspace could be accessing the host's ipaddress attr. If we then free the session via iscsi_session_teardown() while userspace is still accessing the session we will hit a use after free bug. Set the tcp_sw_host->session after we have completed session creation and can no longer fail. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-52974? +

CVE-2023-52974 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-52974? +

CVE-2023-52974 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-52974? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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