CVE-2018-11273 - Double Free

Severity

46%

Complexity

39%

Confidentiality

106%

In all android releases (Android for MSM, Firefox OS for MSM, QRD Android) from CAF using the linux kernel, 'voice_svc_dev' is allocated as a device-managed resource. If error 'cdev_alloc_err' occurs, 'device_destroy' will free all associated resources, including 'voice_svc_dev' leading to a double free.

In all android releases (Android for MSM, Firefox OS for MSM, QRD Android) from CAF using the linux kernel, 'voice_svc_dev' is allocated as a device-managed resource. If error 'cdev_alloc_err' occurs, 'device_destroy' will free all associated resources, including 'voice_svc_dev' leading to a double free.

CVSS 3.0 Base Score 7.8. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 4.6. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:P/I:P/A:P).

Demo Examples

Double Free

CWE-415

Double Free

CWE-415

While contrived, this code should be exploitable on Linux distributions which do not ship with heap-chunk check summing turned on.


               
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free(buf1R2);

Overview

First reported 6 years ago

2018-09-18 18:29:00

Last updated 6 years ago

2018-11-09 17:47:00

Affected Software

Google Android Operating System

References

https://source.android.com/security/bulletin/pixel/2018-09-01#qualcomm-components

Patch, Vendor Advisory

https://source.codeaurora.org/quic/la/kernel/msm-3.18/commit/?id=789d4d21c3f1818dcbf74da4a051598e8f53676c

Patch, Third Party Advisory

https://source.codeaurora.org/quic/la/kernel/msm-4.9/commit/?id=f34f6271362484c1f87f4176e72a3bfb80ee7711

Patch, Third Party Advisory

https://www.codeaurora.org/security-bulletin/2018/09/04/september-2018-code-aurora-security-bulletin

Patch, Third Party Advisory

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