CVE-2017-1000251
A stack buffer overflow flaw was found in the way the Bluetooth subsystem of the Linux kernel processed pending L2CAP configuration responses from a client. On systems with the stack protection feature enabled in the kernel (CONFIG_CC_STACKPROTECTOR=y, which is enabled on all architectures other than s390x and ppc64[le]), an unauthenticated attacker able to initiate a connection to a system via Bluetooth could use this flaw to crash the system. Due to the nature of the stack protection feature, code execution cannot be fully ruled out, although we believe it is unlikely. On systems without the stack protection feature (ppc64[le]; the Bluetooth modules are not built on s390x), an unauthenticated attacker able to initiate a connection to a system via Bluetooth could use this flaw to remotely execute arbitrary code on the system with ring 0 (kernel) privileges.
Find out more about CVE-2017-1000251 from the MITRE CVE dictionary dictionary and NIST NVD.
Statement
This issue does not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 5.
This issue affects the version of the kernel packages as shipped with Red Hat Enterprise Linux 6 and 7, and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise MRG 2 will address this issue.
For further information please refer to the vulnerability article in the Customer Portal: https://access.redhat.com/security/vulnerabilities/blueborne
CVSS v2 metrics
| Base Score | 6.8 |
|---|---|
| Base Metrics | AV:A/AC:H/Au:N/C:C/I:C/A:C |
| Access Vector | Adjacent Network |
| Access Complexity | High |
| Authentication | None |
| Confidentiality Impact | Complete |
| Integrity Impact | Complete |
| Availability Impact | Complete |
CVSS v3 metrics
| CVSS3 Base Score | 7.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Attack Vector | Adjacent Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity Impact | High |
| Availability Impact | High |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux Server TUS (v. 6.6) (kernel) | RHSA-2017:2731 | 2017-09-14 |
| Red Hat Enterprise Linux Extended Update Support 7.3 (kernel) | RHSA-2017:2680 | 2017-09-12 |
| Red Hat Enterprise Linux Server TUS (v. 6.5) (kernel) | RHSA-2017:2707 | 2017-09-13 |
| Red Hat Enterprise Linux 7 (kernel) | RHSA-2017:2679 | 2017-09-12 |
| Red Hat Enterprise Linux Advanced Update Support 6.5 (kernel) | RHSA-2017:2707 | 2017-09-13 |
| Red Hat Enterprise Linux Extended Update Support 6.7 (kernel) | RHSA-2017:2682 | 2017-09-12 |
| Red Hat Enterprise Linux for Real Time for NFV (v. 7) (kernel-rt) | RHSA-2017:2704 | 2017-09-13 |
| Red Hat Enterprise Linux Advanced Update Support 6.4 (kernel) | RHSA-2017:2683 | 2017-09-12 |
| Red Hat Enterprise Linux 6 (kernel) | RHSA-2017:2681 | 2017-09-12 |
| Red Hat Enterprise Linux Advanced Update Support 6.2 (kernel) | RHSA-2017:2732 | 2017-09-14 |
| Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) | RHSA-2017:2705 | 2017-09-13 |
| Red Hat Enterprise Linux Advanced Update Support 6.6 (kernel) | RHSA-2017:2731 | 2017-09-14 |
| Red Hat Enterprise Linux Extended Update Support 7.2 (kernel) | RHSA-2017:2706 | 2017-09-13 |
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise MRG 2 | realtime-kernel | Affected |
| Red Hat Enterprise Linux 7 | kernel-alt | Affected |
| Red Hat Enterprise Linux 5 | kernel | Not affected |