CVE-2023-53032: linux kernel Integer Overflow — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: Fix overflow before widen in the bitmap_ip_create() function. When first_ip is 0, last_ip is 0xFFFFFFFF, and netmask is 31, the value of an arithmetic expression 2 << (netmask - mask_bits - 1) is subject to overflow due to a failure casting operands to a larger data type before performing the arithmetic. Note that it's harmless since the value will be checked at the next step. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with SVACE.

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CVSS v3.1 Score

5.5

MEDIUM

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

Weakness Type (CWE)

CWE-190 Integer Overflow

Affected Products

Vendor	Product	Versions
linux	linux_kernel	3.7 — 4.14.303
linux	linux_kernel	4.15 — 4.19.270
linux	linux_kernel	4.20 — 5.4.229
linux	linux_kernel	5.5 — 5.10.164
linux	linux_kernel	5.11 — 5.15.89
linux	linux_kernel	5.16 — 6.1.7
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/4e6a70fd840400e3a2e784a6673968a3eb2431c0 https://git.kernel.org/stable/c/511cf17b2447fc41cfef8d71936e1fa53e395c1e https://git.kernel.org/stable/c/9ea4b476cea1b7d461d16dda25ca3c7e616e2d15 https://git.kernel.org/stable/c/dfd834ccc1b88bbbab81b9046a3a539dd0c2d14f https://git.kernel.org/stable/c/e137d9bb26bd85ce07323a38e38ceb0b160db841 https://git.kernel.org/stable/c/e88865876d47c790be0d5e23973499d75d034364 https://git.kernel.org/stable/c/feefb33eefa166fc3e0fd17547b0bc0cb3baced9

Frequently Asked Questions

What is CVE-2023-53032? +

In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: Fix overflow before widen in the bitmap_ip_create() function. When first_ip is 0, last_ip is 0xFFFFFFFF, and netmask is 31, the value of an arithmetic expression 2 << (netmask - mask_bits - 1) is subject to overflow due to a failure casting operands to a larger data type before performing the arithmetic. Note that it's harmless since the value will be checked at the next step. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with SVACE. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53032? +

CVE-2023-53032 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2023-53032? +

CVE-2023-53032 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-2023-53032? +

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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