PT-2021-19446 · Silicon · Iwrap

Published 2021-09-07 · Updated 2021-09-20 · CVE-2021-31609

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Silicon Labs iWRAP versions 6.3.0 and earlier

Description The Bluetooth Classic implementation does not properly handle the reception of an oversized LMP packet greater than 17 bytes, allowing attackers in radio range to trigger a crash in WT32i via a crafted LMP packet.

Recommendations For versions 6.3.0 and earlier, consider disabling the Bluetooth Classic implementation until a patch is available to prevent the reception of oversized LMP packets. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2021-31609

Affected Products

Iwrap

References · 6

• https://osv.dev/vulnerability/CVE-2021-31609 · Vendor Advisory
• https://silabs.com/wireless/bluetooth/bluegiga-classic-legacy-modules/device.wt32i-a · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-31609 · Security Note
• https://t.me/cvenotify/20781 · Telegram Post
• https://dl.packetstormsecurity.net/papers/general/braktooth.pdf · Note
• https://t.me/cibsecurity/28311 · Telegram Post