CVE-2023-53676: linux kernel Memory Corruption — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show() The function lio_target_nacl_info_show() uses sprintf() in a loop to print details for every iSCSI connection in a session without checking for the buffer length. With enough iSCSI connections it's possible to overflow the buffer provided by configfs and corrupt the memory. This patch replaces sprintf() with sysfs_emit_at() that checks for buffer boundries.

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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-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
linux	linux_kernel	3.1 — 4.14.326
linux	linux_kernel	4.15 — 4.19.295
linux	linux_kernel	4.20 — 5.4.257
linux	linux_kernel	5.5 — 5.10.197
linux	linux_kernel	5.11 — 5.15.133
linux	linux_kernel	5.16 — 6.1.55
linux	linux_kernel	6.2 — 6.5.5

References

Advisories & Patches

https://git.kernel.org/stable/c/0cac6cbb9908309352a5d30c1876882771d3da50 https://git.kernel.org/stable/c/114b44dddea1f8f99576de3c0e6e9059012002fc https://git.kernel.org/stable/c/2cbe6a88fbdd6e8aeab358eef61472e2de43d6f6 https://git.kernel.org/stable/c/4738bf8b2d3635c2944b81b2a84d97b8c8b0978d https://git.kernel.org/stable/c/5353df78c22623b42a71d51226d228a8413097e2 https://git.kernel.org/stable/c/801f287c93ff95582b0a2d2163f12870a2f076d4 https://git.kernel.org/stable/c/bbe3ff47bf09db8956bc2eeb49d2d514d256ad2a https://git.kernel.org/stable/c/df349e84c2cb0dd05d98c8e1189c26ab4b116083

Frequently Asked Questions

What is CVE-2023-53676? +

In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show() The function lio_target_nacl_info_show() uses sprintf() in a loop to print details for every iSCSI connection in a session without checking for the buffer length. With enough iSCSI connections it's possible to overflow the buffer provided by configfs and corrupt the memory. This patch replaces sprintf() with sysfs_emit_at() that checks for buffer boundries. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53676? +

CVE-2023-53676 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-2023-53676? +

CVE-2023-53676 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-2023-53676? +

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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