CVE-2023-49100

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.

Read the notes from the security team

• How can I get the fixes?
• What do statuses mean?
• Patch details

Notes

References

• MITRE
• NVD
• Launchpad
• Debian

Other references

• https://trustedfirmware-a.readthedocs.io/en/latest/security_advisories/security-advisory-tfv-11.html
• https://www.cve.org/CVERecord?id=CVE-2023-49100