CVE-2024-6563 Buffer Overflow Arbitrary Write
A buffer overflow in Renesas arm-trusted-firmware allows local attackers to execute arbitrary code by controlling write destinations.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-6563?
CVE-2024-6563 is a high-severity memory corruption vulnerability in Renesas rcar_gen3_v2.5, published on 8 Jul 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2024-6563?
It affects 1 product.
Products include Renesas Arm-Trusted-Firmware.
How do I fix CVE-2024-6563?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2024-6563 being exploited?
There is no known exploitation of CVE-2024-6563 in the wild and no public exploit code.
Other vulnerabilities in Renesas rcar_gen3_v2.5
Sources
Also known as DEBIAN-CVE-2024-6563, GHSA-5mvx-hm4v-mrqg, UBUNTU-CVE-2024-6563.