CVE-2024-6563: arm-trusted-firmwa Buffer Overflow — Fix

Description

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in Renesas arm-trusted-firmware allows Local Execution of Code. This vulnerability is associated with program files https://github.Com/renesas-rcar/arm-trusted-firmware/blob/rcar_gen3_v2.5/drivers/renesas/common/io/i... https://github.Com/renesas-rcar/arm-trusted-firmware/blob/rcar_gen3_v2.5/drivers/renesas/common/io/io_rcar.C . In line 313 "addr_loaded_cnt" is checked not to be "CHECK_IMAGE_AREA_CNT" (5) or larger, this check does not halt the function. Immediately after (line 317) there will be an overflow in the buffer and the value of "dst" will be written to the area immediately after the buffer, which is "addr_loaded_cnt". This will allow an attacker to freely control the value of "addr_loaded_cnt" and thus control the destination of the write immediately after (line 318). The write in line 318 will then be fully controlled by said attacker, with whichever address and whichever value ("len") they desire.

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CVSS v3.1 Score

7.5

HIGH

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

Weakness Type (CWE)

CWE-120 CWE-120

CWE-123 CWE-123

Affected Products

Vendor	Product	Versions
renesas	arm-trusted-firmware	All

References

Advisories & Patches

https://github.com/renesas-rcar/arm-trusted-firmware/commit/235f85b654a031f7647e81b86fc8e4ffeb430164 https://github.com/renesas-rcar/arm-trusted-firmware/commit/235f85b654a031f7647e81b86fc8e4ffeb430164

Other References

https://asrg.io/security-advisories/cve-2024-6563/ https://asrg.io/security-advisories/cve-2024-6563/

Frequently Asked Questions

What is CVE-2024-6563? +

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in Renesas arm-trusted-firmware allows Local Execution of Code. This vulnerability is associated with program files https://github.Com/renesas-rcar/arm-trusted-firmware/blob/rcar_gen3_v2.5/drivers/renesas/common/io/i... https://github.Com/renesas-rcar/arm-trusted-firmware/blob/rcar_gen3_v2.5/drivers/renesas/common/io/io_rcar.C . In line 313 "addr_loaded_cnt" is checked not to be "CHECK_IMAGE_AREA_CNT" (5) or larger, this check does not halt the function. Immediately after (line 317) there will be an overflow in the buffer and the value of "dst" will be written to the area immediately after the buffer, which is "addr_loaded_cnt". This will allow an attacker to freely control the value of "addr_loaded_cnt" and thus control the destination of the write immediately after (line 318). The write in line 318 will then be fully controlled by said attacker, with whichever address and whichever value ("len") they desire. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-6563? +

CVE-2024-6563 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-6563? +

CVE-2024-6563 affects products from renesas, specifically: arm-trusted-firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-6563? +

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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