CVE-2019-9506

Blutooth BR/EDR specification does not specify sufficient encryption key length and allows an attacker to influence key length negotiation

HIGH
8.1
CVSS Score
Published: August 14, 2019 at 04:27 PM UTC
Updated: June 17, 2026 at 02:43 AM UTC
274 products affected across 8 vendorsmacOSDebian LinuxAndroid· also runs on 1 platform

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Severity
HIGH8.1
Exploit prediction
EPSS 3%

Description

The Bluetooth BR/EDR specification up to and including version 5.1 permits sufficiently low encryption key length and does not prevent an attacker from influencing the key length negotiation. This allows practical brute-force attacks (aka "KNOB") that can decrypt traffic and inject arbitrary ciphertext without the victim noticing.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
blackberry-blackberry (environment)
v < 9.1.0.333\(c00e333r2p1t8\)
Affected range stops below 9.1.0.333(c00e333r2p1t8), so it looks safe — our inference, not a vendor statement
huawei-alp-al00b (same device)
v < 9.1.0.160\(c00e160r2p5t8\)
Affected range stops below 9.1.0.160(c00e160r2p5t8), so it looks safe — our inference, not a vendor statement
huawei-ares-al00b (same device)
v < 9.1.0.160\(c00e160r2p5t8\)
Affected range stops below 9.1.0.160(c00e160r2p5t8), so it looks safe — our inference, not a vendor statement
huawei-ares-al10d (same device)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

References (30)

Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00037.html
Mailing Listx_refsource_FULLDISCThird Party Advisory
http://seclists.org/fulldisclosure/2019/Aug/11
Mailing Listx_refsource_FULLDISCThird Party Advisory
http://seclists.org/fulldisclosure/2019/Aug/13
Mailing Listx_refsource_FULLDISCThird Party Advisory
http://seclists.org/fulldisclosure/2019/Aug/14
Mailing Listx_refsource_FULLDISCThird Party Advisory
http://seclists.org/fulldisclosure/2019/Aug/15

CVSS

Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-310CWE-327

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