Ubuntu Security Notice 4989-1 - It was discovered that BlueZ incorrectly checked certain permissions when pairing. A local attacker could possibly use this issue to impersonate devices. Jay LV discovered that BlueZ incorrectly handled redundant disconnect MGMT events. A local attacker could use this issue to cause BlueZ to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. Various other issues were also addressed.
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