Improper input validation in Espressif Esp-Idf
CVE-2018-18558
An issue was discovered in Espressif ESP-IDF 2.x and 3.x before 3.0.6 and 3.1.x before 3.1.1. Insufficient validation of input data in the 2nd stage bootloader allows a physically proximate attacker to bypass secure boot checks and execute arbitrary code, by crafting an application binary that overwrites a bootloader code segment in process_segment in components/bootloader_support/src/esp_image_format.c. The attack is effective when the flash encryption feature is not enabled, or if the attacker finds a different vulnerability that allows them to write this binary to flash memory.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (30.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/espressif/esp-idf/releases (Third Party Advisory, Release Notes)
- www.espressif.com/en/news/Espressif_Product_Security_Advisory_Concerning_Secure…
Frequently asked questions
- What is CVE-2018-18558?
- CVE-2018-18558 is a medium-severity vulnerability in Espressif Esp-Idf, classified under Improper Input Validation. CVSS score: 6.4/10. Published 2019-05-13.
- How severe is CVE-2018-18558?
- Medium severity. CVSS v3 base score is 6.4 out of 10.