CVE-2024-538456.6MediumCWE-327

CVE-2024-53845: AES/CBC Constant IV Vulnerability in ESPTouch v2

espressif · esp-idf

Affected: espressif esp-idf · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.6%probability of exploitation in the next 30 days

49th percentile

050100

Higher than 49% of scored CVEs

6.6MediumCVSS 4.0

LowMediumHighCrit.

DescriptionCVE.org

ESPTouch is a connection protocol for internet of things devices. In the ESPTouchV2 protocol, while there is an option to use a custom AES key, there is no option to set the IV (Initialization Vector) prior to versions 5.3.2, 5.2.4, 5.1.6, and 5.0.8. The IV is set to zero and remains constant throughout the product's lifetime. In AES/CBC mode, if the IV is not properly initialized, the encrypted output becomes deterministic, leading to potential data leakage. To address the aforementioned issues, the application generates a random IV when activating the AES key starting in versions 5.3.2, 5.2.4, 5.1.6, and 5.0.8. This IV is then transmitted along with the provision data to the provision device. The provision device has also been equipped with a parser for the AES IV. The upgrade is applicable for all applications and users of ESPTouch v2 component from ESP-IDF. As it is implemented in the ESP Wi-Fi stack, there is no workaround for the user to fix the application layer without upgrading the underlying firmware.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

espressif · esp-idf>= 5.3.0, < 5.3.2; >= 5.2.0, < 5.2.4; >= 5.1.0, < 5.1.6; < 5.0.8

On the Atlas

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Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Use of a Broken or Risky Cryptographic Algorithm · Cryptography
Vendor: espressif
Published: December 2024
Band: Unlikely (under 1%), December 2024

CoverageNo articles yet

No CyberSIXT article names CVE-2024-53845 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.