CVE-2024-6563 Information

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 ddr_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 ddr_loaded_cnt. This will allow an attacker to freely control the value of ddr_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.

Reference

https://github.com/renesas-rcar/arm-trusted-firmware/commit/235f85b654a031f7647e81b86fc8e4ffeb430164 https://asrg.io/security-advisories/cve-2024-6563/