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.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1076042&gt;

Notes