CVE-2023-49100 Memory corruption in n/a
A compromised normal world kernel can trigger an out-of-bounds read in Trusted Firmware-A, causing a crash in the secure monitor.
- 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-2023-49100?
CVE-2023-49100 is a medium-severity memory corruption vulnerability in n/a, published on 21 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Trusted Firmware-A (TF-A) before 2.10 has a potential read out-of-bounds in the SDEI service. The input parameter passed in register x1 is not validated well enough in the function sdei_interrupt_bind. The parameter is passed to a call to plat_ic_get_interrupt_type. It can be any arbitrary value passing checks in the function plat_ic_is_sgi. A compromised Normal World (Linux kernel) can enable a root-privileged attacker to issue arbitrary SMC calls. Using this primitive, he can control the content of registers x0 through x6, which are used to send parameters to TF-A. Out-of-bounds addresses can be read in the context of TF-A (EL3). Because the read value is never returned to non-secure memory or in registers, no leak is possible. An attacker can still crash TF-A, however.
Weakness: CWE-125
Which versions are affected by CVE-2023-49100?
How do I fix CVE-2023-49100?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-49100 being exploited?
There is no known exploitation of CVE-2023-49100 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2023-49100, DEBIAN-CVE-2023-49100, GHSA-rmvf-wrpj-7c43, OESA-2024-1264, UBUNTU-CVE-2023-49100.