CVE-2023-49100 Affecting arm-trusted-firmware package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU2004-ARMTRUSTEDFIRMWARE-6262071
- published5 Mar 2024
- disclosed21 Feb 2024
Introduced: 21 Feb 2024
CVE-2023-49100 (opens in a new tab)How to fix?
There is no fixed version for Ubuntu:20.04 arm-trusted-firmware.
NVD Description
Note: Versions mentioned in the description apply only to the upstream arm-trusted-firmware package and not the arm-trusted-firmware package as distributed by Ubuntu.
See How to fix? for Ubuntu:20.04 relevant fixed versions and status.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2023-49100
- https://github.com/ARM-software/arm-trusted-firmware/blob/a05414bedc9b1cc35cf0795ce641b6b4db5bc97e/services/std_svc/sdei/sdei_main.c#L708
- https://github.com/ARM-software/arm-trusted-firmware/blob/a05414bedc9b1cc35cf0795ce641b6b4db5bc97e/services/std_svc/sdei/sdei_main.c#L714
- https://trustedfirmware-a.readthedocs.io/en/latest/security_advisories/security-advisory-tfv-11.html